Riven said:
I wonder what the percentage of users still use IE6 and earlier are? 
About 30%. Unfortunately a lot of companies are IE6 only as their company intranets only work with IE6 and they daren't change it. Some just also don't want to have to deploy IE7 due tot he work involved, and they won't use anything other than IE because the likes of Firefox's server deployment features are utter crap.
Firefox is around 20%, Opera < 1%, Chrome and Safari abour 3-4%, and the remaining largest single chunk is IE7
However on technology related sites (ie sites whose users have any sort of basic clue) Firefox is about 50%, IE about 20% and the rest mostly Safari with some Opera and (increasingly) Chrome
For snarkpit about 22% is IE, 34% Firefox, 3% Opera, 3% Safari and (helpfully) 36% 'unknown', but I put this down to globat's webstats being crap. I'd guess it's mostly made up of Firefox running extensions and possibly Chrome.