Yea i think the potential complexity of the FMod API scares alot of people away if they're not used to that level of coding, pity really, as it can do so much. I have some cool ideas in store for it once i get the core implementation down, much to do with the 6 chan setup im doing, so i'll be able to throw sounds out to individual speakers and tweak bass/treble levels per speaker, adjust timings to help the soundstage etc. FMod makes anything possible
I agree that flash is a good way to go, 30kb skin is definately nice, and you have so much more control of how the interface works with animations, popups etc. I went the "old fashioned" way of XML defined skin using plain images, just varying it a bit with arbitrary polygon-based buttons.
Should be good once you get a nice skin on it I'll look forward to the updates.