Here’s BtBx, for the iPhone and iPod touch. I think you pronounce it “beatbox”. And it’s lovely. There’s so much potential for music apps on the iPhone and I’m one of the people who’s very keen to try them out. BeatMaker is top of the tree in the App Store right now, but there’s a lot about BtBx that appeals to me. The interface is cartoon-like, but I like it that way. It works and it doesn’t crash, and those things matter more to me than aesthetics.