You can play the fiddle, the piano, and plenty of other instruments on your iPhone, so why not the trumpet too?
With the iTrump app, all you have to do is spend three bucks and you'll be able to play a tune by either touching or blowing your iPhone. I recommend taking the touching route, because let's face it: The gadget doesn't exactly have a spit valve you can clean out.
No matter what you decide to do though, know that iTrump is available in the iTunes app store now. [iTunes]