1.05% here. I'm not supporting it at all, going forward. Hello CSS sprites and PNG alpha transparency!
IE6 users will get a friendly message "Browser out of date. Did you know your current web browser (Internet Explorer 6) was superseded in 2006? That's almost 30 years ago in internet time! Please click here to upgrade your browser and enjoy all that the modern internet has to offer. We look forward to seeing you again soon"... or something to that effect.