What's to stop people just inserting bad test results? Seems like it could be really unreliable/dirty/bogus data.
BTW here's my testing :D http://axod.net/browserTesting.png (OSX+Firefox/Safari/Opera, XP+IE6, XP+IE7, XP+IE8, XP+Chrome/Firefox, Ubuntu+Firefox). Thought it might make my macbook sluggish, but it just carried on regardless :)