I have this question in my head, and maybe someone have the answer.
I believe that the support of x64 debugging (AMD64) will be important, also because this kind of processors will be more popular than the x86. IMHO

I think Oleh said that he wont make x64 support in odbg2.

why the hell not

Send him an email and ask

polaris you do it and write his responce here :P