2009/2/20 Chad innocentkiller@gmail.com:
I would be willing to bet the vast majority of IE6 users left are on corporate networks as mentioned above, and have little to no control over what browser they use. At my former job, XP and IE6 were the standard supported platforms, and they had given no indication of wishing to change this anytime soon.
If I'm reading this [1] right, they can't wait too long - Microsoft won't be supporting IE6 past July 2010. Using IE6 without security updates would be a very bad plan! Given the end of support isn't that far away (assuming they don't extend it), we should probably continue supporting it until then. Once Microsoft stop supporting it, I think it's completely reasonable for us to stop too.
1. http://support.microsoft.com/gp/lifesupsps#Internet_Explorer