OK - So there's a lot of talk about IE6 not being supported, that IE6 wasn't tested, and IE6 performs really badly for a Web Publisher / Contributor - but what features don't work for the end-user? Will a Visitor be able to add a comment to a blog, rate a page, tag a page, manage their tags...?
I saw two good posts about this earlier in the year:
Tags will work, but there is so much other stufff that doesn't that it makes the whole experience unpleasant. I would definitely not recommend using SP2010 with IE6.