Have you used iTunes 6 before & not had the same problem?? I honestly don't know how you have .wma files there, because the 'import using' thing that I mentioned before applies to what you rip as well!

Bear with me for a little while, while I change to iTunes 7 & then rip a CD & see whether I can get .wma as an option.

What OS are you using?

AAC's one of the iTunes supported formats but I'm stumped with the wma. As you can see, it's not even an option for me & AFAIK it never was.