You can get the DVD via Netflix, if you're a subscriber. I just watched it last night, and it was pretty good. I primarily rented it based on Jake's song alone, which is great, but it had pretty good user reviews too.
A bit formulaic (ragtag group of misfits meets outsider who begrudgingly tries to whip them into shape in time to save the [fill in the blank]--how many times have you seen that?).But there's nothing wrong with formula if it's done well, and this did it well.
JJ