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%
Still, this is a great trend.