I've updated the above list with some recent crawlers that where snooping my board. So feel free to use it smile.

PHP Code
Alexa=ia_archiver
Altavista=Scooter
AllTheWeb=FAST-WebCrawler
Bing=bingbot
Excite=ArchitextSpider
Gigabot=Gigabot
Google=Googlebot
Google Mobile=Googlebot-Mobile
Google Images=Googlebot-Image
Google Adsense=Mediapartners-Google
Magpie=magpie-crawler
Yahoo=Yahoo! Slurp
Yandex=YandexBot
Inktomi=Slurp
MSN=MSNBOT