Wow, I just might do that. Both of those apps look promising. Budgerigar says it will export MIDI, and the full version is only $4.33. The comments seem to say it's pretty basic, but I think it's worth looking into at least. Caustic looks impressive, but I don't see the price stated anywhere.
We've gone WAY O/T here, but it's my thread, and I don't mind a bit as long as the mods don't.