I was listening to some latin jazz piped in a restaurant a couple of days ago and thought, "That's a great groove, I wonder what the tempo is? It'd be nice if I could tap that into my iPhone." Turns out, Masayuki Akamatsu thought the same thing and what's more, has made the app, uploaded it to the App Store and is giving it away for FREE!
This is a cool app, just tried it out.