Misfits season 2
 

For those not in the UK, torrents for the first episode are up now (try eztv).

Get it, motherfuckers.

Is it a horror series?

There's elements of horror?
I'd say it was more sci-fi/comedy though.
But seriously, not to be missed.
The short version is: Sentenced community service workers are granted...kind of unusual abilities. Though there's a lot more to it than that.
Very funny, REALLY well written.
You could probably get a torrent of the 6 episode first series pretty easily, I guarantee if you watch the pilot, you'll probably want to watch through the entire season over a day or two.