I've been down on the fine folks at Smule in the past -- I've said that their app Ocarina seems kind of silly (even if people have created some pretty awesome stuff with it and other less annoying music apps). And about the only thing they could have done to make it up to me was to develop some sort of super massively multiplayer music app, some app in which you could play a tune and have it sent all around the world. So I guess I have to call off my pretend grudge against them once and for all, because that's exactly what they did: Leaf Trombone: World Stage is in the App Store right now.
This is, of course, the app with the strange name that we saw at Apple's iPhone 3.0 demo. It features a Chinese leaf-type instrument that sounds, as you can hear above, like a trombone. But the World Stage part is the most interesting -- Smule has set up a way to share the songs you play in the app with people around the world, and the people who hear your work can send back short messages and emotes to say how they felt. It's an interesting idea -- kind of combines what they were trying to do with Zephyr into a more Ocarina-like app.
At just 99 cents, there will undoubtedly be lots of musicians out there picking it up. And while the video above is... cute... we're sure there'll be some even better stuff to listen to soon.