Using voice to run programs, music and such?

I've set my Droid on my dash, and it's plugged into my aux in my head unit, frickin awesome.... anyway what I'm wondering is there an app somewhere that I can use to open and run basically everything on the phone?

I noticed I can say "Open Music" in Voice Search and it'll open up the Music app, but I'm looking deeper, is there anything where I can say a specific band, or song for it to play?

That's just a music example, I'm looking to be as hands free as possible when in the car, just not sure where to begin to look if there is such an app that gets that specific on what it can open.

Thanks! :icon_ banana: