Verto said:I'm wondering how iTunes will handle the .wmas/.mp3s - will it try to convert it somehow, or be able to read them as-is?
iTunes does not support the .wma format. It does support mp3s, so you're ok there. It won't convert them to anything else when you import them.
There's one solution you can do as long as your wmas are not protected. Use the PC version of iTunes and import them into the library, and it'll automatically convert them to AAC (or other formats I believe. Can anyone back me up on this?). Then take the newly converted files and dump them into your new Mac.
(I know it sucks to have to use your PC. As to why Apple didn't include this feature in their Mac version is beyond me. There are countless times when I had to borrow someone's PC to convert wmas!)