Sadly, we still need to support IE6 in most cases as it still represents a significant portion of the internet surfing users. If you are in a corporate environment, this is even more true, as corporations have less incentive to upgrade stuff the works simply for some pie-in-the-sky "web standards."
If not, try to gmail approach and just toss up an error for IE6 viewers and/or display a disclaimer that if they upgrade, the site will work/look better.
