I try to make my websites work in ie6 but with minimal work, I'll let IE6 users use it but it will be a degraded experience and most of my website for normal people actually haven't seen such high IE6 usage as 6.5%.
I think that's pretty much the best solution. For old browsers in general, have a legacy HTML-only fallback site. This makes IE6 and Lynx users happy alike :-) It doesn't need to be pretty but it needs to be functional enough to do all the stuff your customers need to do.
