User-agent: Yandex
Disallow: /a/
Disallow: /stat/
Disallow: /index/1
Disallow: /index/2
Disallow: /index/3
Disallow: /index/5
Disallow: /index/7
Disallow: /index/8
Disallow: /index/9
Disallow: /panel/
Disallow: /admin/
Disallow: /secure/
Disallow: /informer/
Disallow: /mchat
Disallow: /search
Allow: /

Host: www.сайт.ru
Sitemap: http://www.сайт/sitemap.xml

а у меня стоит

User-agent: *
Disallow: /a/
Disallow: /stat/
Disallow: /index/1
Disallow: /index/2
Disallow: /index/3
Disallow: /index/5
Disallow: /index/7
Disallow: /index/8
Disallow: /index/9
Disallow: /panel/
Disallow: /admin/
Disallow: /secure/
Disallow: /informer/
Disallow: /mchat
Disallow: /search

Host: www.сайт.ru
Sitemap: http://www.сайт/sitemap.xml

скажите плз какой из них лучше и какой лучше поставить

Если вы думаете, что смените роботс и у вас тоже будет 50000 хостов, то ошибаетесь...

User-Agent: *
Allow: /$
Allow: /search/advanced$
Allow: /search/advanced/$
Disallow: /

Это яши! ТС ставь его сразу миллион будет посетителей!

Host: www.сайт.ru
Sitemap: http://www.сайт/sitemap.xml

Добавлено (18.06.2010, 20:23)
---------------------------------------------
Vangan, ты не сомневайся если нада будет то посмотрю

User-agent: *
Disallow: /?
Disallow: /404.html
Disallow: /about.html
Disallow: /advanced_engl.html
Disallow: /advertising
Disallow: /articles
Disallow: /chisla.html
Disallow: /cgi-bin/
Disallow: /cgi/
Disallow: /cy
Disallow: /dzen.html
Disallow: /i/
Disallow: /ie3/yandsearch
Disallow: /keyboard_qwerty.html
Disallow: /logotypes
Disallow: /norobot
Disallow: /polling
Disallow: /redir
Disallow: /regions.html?
Disallow: /s/
Disallow: /setup
Disallow: /skazki
Disallow: /subscribe/confirm.pl
Disallow: /subscribe/view.pl
Disallow: /yaca
Disallow: /ya
Disallow: /yandsearch
Disallow: /catalog/?text=

P.S. Почему вы сделали такой вывод, интересно мне знать, что если поставить robots.txt от Яндекса себе на сайт будет миллион посетителей! С чего!?

Добавлено (19.06.2010, 07:57)
---------------------------------------------
Google robots.txt

User-agent: *
Disallow: /search
Disallow: /groups
Disallow: /images
Disallow: /catalogs
Disallow: /catalogues
Disallow: /news
Allow: /news/directory
Disallow: /nwshp
Disallow: /setnewsprefs?
Disallow: /index.html?
Disallow: /?
Disallow: /addurl/image?
Disallow: /pagead/
Disallow: /relpage/
Disallow: /relcontent
Disallow: /imgres
Disallow: /imglanding
Disallow: /keyword/
Disallow: /u/
Disallow: /univ/
Disallow: /cobrand
Disallow: /custom
Disallow: /advanced_group_search
Disallow: /googlesite
Disallow: /preferences
Disallow: /setprefs
Disallow: /swr
Disallow: /url
Disallow: /default
Disallow: /m?
Disallow: /m/?
Disallow: /m/blogs?
Disallow: /m/ig
Disallow: /m/images?
Disallow: /m/local?
Disallow: /m/movies?
Disallow: /m/news?
Disallow: /m/news/i?
Disallow: /m/place?
Disallow: /m/setnewsprefs?
Disallow: /m/search?
Disallow: /m/swmloptin?
Disallow: /m/trends
Disallow: /wml?
Disallow: /wml/?
Disallow: /wml/search?
Disallow: /xhtml?
Disallow: /xhtml/?
Disallow: /xhtml/search?
Disallow: /xml?
Disallow: /imode?
Disallow: /imode/?
Disallow: /imode/search?
Disallow: /jsky?
Disallow: /jsky/?
Disallow: /jsky/search?
Disallow: /pda?
Disallow: /pda/?
Disallow: /pda/search?
Disallow: /sprint_xhtml
Disallow: /sprint_wml
Disallow: /pqa
Disallow: /palm
Disallow: /gwt/
Disallow: /purchases
Disallow: /hws
Disallow: /bsd?
Disallow: /linux?
Disallow: /mac?
Disallow: /microsoft?
Disallow: /unclesam?
Disallow: /answers/search?q=
Disallow: /local?
Disallow: /local_url
Disallow: /froogle?
Disallow: /products?
Disallow: /products/
Disallow: /froogle_
Disallow: /product_
Disallow: /products_
Disallow: /print
Disallow: /books
Disallow: /bkshp?q=
Allow: /booksrightsholders
Disallow: /patents?
Disallow: /patents/
Allow: /patents/about
Disallow: /scholar
Disallow: /complete
Disallow: /sponsoredlinks
Disallow: /videosearch?
Disallow: /videopreview?
Disallow: /videoprograminfo?
Disallow: /maps?
Disallow: /mapstt?
Disallow: /mapslt?
Disallow: /maps/stk/
Disallow: /maps/br?
Disallow: /mapabcpoi?
Disallow: /maphp?
Disallow: /places/
Disallow: /maps/place
Disallow: /help/maps/streetview/partners/welcome/
Disallow: /lochp?
Disallow: /center
Disallow: /ie?
Disallow: /sms/demo?
Disallow: /katrina?
Disallow: /blogsearch?
Disallow: /blogsearch/
Disallow: /blogsearch_feeds
Disallow: /advanced_blog_search
Disallow: /reader/
Allow: /reader/play
Disallow: /uds/
Disallow: /chart?
Disallow: /transit?
Disallow: /mbd?
Disallow: /extern_js/
Disallow: /calendar/feeds/
Disallow: /calendar/ical/
Disallow: /cl2/feeds/
Disallow: /cl2/ical/
Disallow: /coop/directory
Disallow: /coop/manage
Disallow: /trends?
Disallow: /trends/music?
Disallow: /trends/hottrends?
Disallow: /trends/viz?
Disallow: /notebook/search?
Disallow: /musica
Disallow: /musicad
Disallow: /musicas
Disallow: /musicl
Disallow: /musics
Disallow: /musicsearch
Disallow: /musicsp
Disallow: /musiclp
Disallow: /browsersync
Disallow: /call
Disallow: /archivesearch?
Disallow: /archivesearch/url
Disallow: /archivesearch/advanced_search
Disallow: /base/reportbadoffer
Disallow: /urchin_test/
Disallow: /movies?
Disallow: /codesearch?
Disallow: /codesearch/feeds/search?
Disallow: /wapsearch?
Disallow: /safebrowsing
Allow: /safebrowsing/diagnostic
Allow: /safebrowsing/report_error/
Allow: /safebrowsing/report_phish/
Disallow: /reviews/search?
Disallow: /orkut/albums
Disallow: /jsapi
Disallow: /views?
Disallow: /c/
Disallow: /cbk
Disallow: /recharge/dashboard/car
Disallow: /recharge/dashboard/static/
Disallow: /translate_a/
Disallow: /translate_c
Disallow: /translate_f
Disallow: /translate_static/
Disallow: /translate_suggestion
Disallow: /profiles/me
Allow: /profiles
Disallow: /s2/profiles/me
Allow: /s2/profiles
Allow: /s2/photos
Allow: /s2/static
Disallow: /s2
Disallow: /transconsole/portal/
Disallow: /gcc/
Disallow: /aclk
Disallow: /cse?
Disallow: /cse/home
Disallow: /cse/panel
Disallow: /cse/manage
Disallow: /tbproxy/
Disallow: /comparisonads/
Disallow: /imesync/
Disallow: /shenghuo/search?
Disallow: /support/forum/search?
Disallow: /reviews/polls/
Disallow: /hosted/images/
Disallow: /ppob/?
Disallow: /ppob?
Disallow: /ig/add?
Disallow: /adwordsresellers
Disallow: /accounts/o8
Allow: /accounts/o8/id
Disallow: /topicsearch?q=
Disallow: /xfx7/
Disallow: /squared/api
Disallow: /squared/search
Disallow: /squared/table
Disallow: /toolkit/
Allow: /toolkit/*.html
Disallow: /qnasearch?
Disallow: /errors/
Disallow: /app/updates
Disallow: /sidewiki/entry/
Disallow: /quality_form?
Disallow: /labs/popgadget/search
Disallow: /buzz/post
Disallow: /compressiontest/
Disallow: /analytics/reporting/
Disallow: /analytics/admin/
Disallow: /analytics/web/
Disallow: /analytics/feeds/
Disallow: /analytics/settings/
Sitemap: http://www.gstatic.com/s2/sitemaps/profiles-sitemap.xml
Sitemap: http://www.google.com/hostednews/sitemap_index.xml
Sitemap: http://www.google.com/ventures/sitemap_ventures.xml
Sitemap: http://www.google.com/sitemaps_webmasters.xml
Sitemap: http://www.gstatic.com/trends/websites/sitemaps/sitemapindex.xml
Sitemap: http://www.gstatic.com/dictionary/static/sitemaps/sitemap_index.xml

P.S. Кто то выше говорил, что его в поисковой системе Google robots.txt НЕТ, а это, что тогда!?