Newbie question from potential iPhone convert

Okay, I'm a 3Gs user right now, but I've been drooling over the Froyo development and am considering making the jump when my contract expires in 13 months (yeah, I know, a while). Still, I've got a complete newbie question that will make some difference to me in whether we convert or not. My wife and I are on the same iTunes account, meaning that when I purchase an app, we get that app on both her iPhone and mine without being double charged. Does that hold true with the Android Marketplace as well? Will I have to buy two copies of the same program, especially since we'll be on the same account? How does that work?

Also, how is the Android as a music/video player? I've been looking at bTunes and it looks like a great app. Any comments?

Thanks,

Total Newbie, ready to get flamed

Kenny