Songsmith

Songsmith - an amazingly cool Music composition tool from Microsoft. Basically, you can create music from scratch with it with the genre of your choice (Rock, Jazz, RnB etc). According to what I've read, you can change the music to match your mood - joyful, sad, angry etc.  Think Parrapa the rapper with more options, more possibilities. 

Ok, from a technical view of things, this is really cool. And yeah, watch the vids.

The actual silly ad and tech demo: