I don't actually have iTunes installed, but I was able to get BIAB to render a BIAB file to .m4a format in the BB2Go folder.

I was then able to download it and play it on my iPad, but I was unable (for example) to change the key on the iPad and have the piece regenerated in the new key.

About to give up for the night, I tried to shut down BIAB and got:

"Access violation at address 00404FFC in module 'bbw.exe'. Read of address 00000024 at: 00404FFC."

[I'd rather hoped that version 2012 would get rid of these access violations and program hangs, but I had previously got a number of them when I tried running through the first four bars of each piece in a large folder with the Juke Box feature in order to find out from the yellow warning messages what RealTracks I was missing. This is obviously a topic for another thread, and another day!]