Actually this is my personal robot list (work in progress).
I hope it will be usefull.
Andrea

var $robots = array("Acoon", "AhrefsBot", "Baiduspider", "bingbot", "cuill",
"Crowsnest", "discobot", "EC2LinkFinder", "EdisterBot", "Eurobot", "exabot",
"Ezooms", "facebookexternalhit", "googlebot", "Google-Site-Verification",
"GSLFbot", "ia_archiver", "ichiro", "IstellaBot", "jeeves", "JS-Kit",
"libwww-perl", "LinkedInBot", "LinkExaminer", "Mail.RU", "MetaURI", "MJ12bot",
"MLS.net", "msnbot", "Openindex", "Python-urllib", "Plukkie", "PostRank",
"psbot", "ScoutJet", "SEOkicks-Robot", "sGroup", "ShowyouBot", "sistrix",
"SiteSucker", "Slurp", "Speedy", "ssearch_bot", "SurveyBot", "SWEBot",
"TurnitinBot", "TweetmemeBot", "Twitmunin", "Twitterbot", "UnwindFetchor",
"VoilaBot", "Voluniabot", "Voyager", "W3C_CSS_Validator_JFouffa",
"W3C_Validator", "WBSearchBot", "YandexBot", "80legs");