I think that conversion guides may be the answer to healing the edition rift plaguing the D&D community.
It will actually really help with conversions if people were interested in converting both ways. 3.5 players could help 4.0 players and vice-versa.
I know my players and I will be staying 3.5, but we will definitely be converting 4e things we like. When we convert something, I will try to make it available.