I've been listening to a lot of Keating
and Red Jumpsuit Apparatus.
I think both could become big. Though the latter may be in for a TRL-kind-of-big.
Also listening to a ton of Alkaline Trio
, who I saw in concert a few weeks ago. They were AMAZING.
Others ... Panic! At the Disco (I can't help it!), Circa Survive, Dredg, Muse, Hawthorne Heights, The Audition, Motion City Soundtrack, Aiden, Matchbook Romance, Emberghost, Alexisonfire, and of course 30 Seconds to Mars.
Two bands I've seen live recently that put on great shows: Hellogoodbye, and Men Women & Children. Neither are exactly the kind of music I gravitate toward, but both were hilarious live. In a good way.