The first time you're driving through the middle of nowhere at 3 am you'll appreciate 150 crystal clear channels to choose from versus some local swap shop :p
Yeah I thought there would be. Unless it's something specific you want to listen to I wouldn't pay for an app when so many are available. Having said that, I'd never give up my Sirius.
I don't use a Droid but don't they have free streaming apps? On my iPhone I have stitcher, shoutcast, and tunein and they were free. I usually just listen to Sirius though. Content is king.