[jameskpolk]

But when a large site like Facebook stops supporting IE6, lots of people will upgrade. Facebook is an "important" site, in that people want to use it, no matter what.

I'd say the majority of us web people aren't working for sites as large and important as Facebook -- thus, we can't dictate anything to our users. We can, however, benefit from the anti-IE6 momentum they create.

Killing IE6 has to start from the top.