Andy Clarke suggests a universal IE6 stylesheet for all sites:

That is why I’m now advocating to my clients (and to you), that where feasible, not to waste hours in time and a client’s money on lengthy workarounds in an unnecessary attempt at cross-browser perfection. Instead, you and I should provide simple but effectively designed HTML elements. This means just great typography for headings, paragraphs, quotations, lists, tables and forms and no styling of layout.

I think we’re still a ways off from this being acceptable for sites intended to be mainstream, but it’s probably a nice intermediary option down the road, and perhaps appropriate now for sites with very limited IE6 audiences.