In the enterprise space, IE6 usage has fallen significantly from Dec 2010 to Dec 2011 according to my own observations, but it's still not near enough zero for my own comfort:
Dec 2009: IE 6.0 share is 37.3%
Dec 2010: IE 6.0 share is 15.5%
Dec 2011: IE 6.0 share is 6.8%
and just for the rest of the IE figures from this particular site in the enterprise (sorry, not comfortable releasing actual session counts, all I can say it's in the hundreds of thousands of unique users):
External site, accessed by external companies. Granted, we only "support" the products on IE and Firefox, but the usage is still pretty varied, as they all mostly under other browsers.
It looks like IE6 and IE7 are just being dropped as that organization adopts Windows 7 for new hardware as old hardware gets triaged out whenever it breaks.
Not that it's an entirely bad thing, but since IE8 is becoming more standard, wouldn't updating to IE9 be easier?
Windows XP is still being supported by Microsoft (until April 2014). I think that IE8 is the most recent version of Internet Explorer which will ever work on Windows XP.
