Just read the latest news on bannister.org and it says that he's working on adding .gsf (Gameboy Advance) support to the next Audio Overload (2.0b3). All I can say is, hats off to you, Richard. With this format, the only format that remains untouched in the Mac community is .usf! (which, as nice as it would be to have, I won't be holding my breath)
Keep up the stellar work and may the next release come swiftly and without remorse!