D&D 3.0 has done very well for our group. I think what we're going to see is a lot of people that use 3.0/3.5 hybrids. There's some changes in 3.5 I wouldn't dream of using (new Spell Focus) and others that I can't imagine being without (new Ranger class). Maybe I'm wrong, but I think a lot of groups will be doing the same.