If you like Jimmy Eat World you'd probably like Last Winter. They are a little more emo-ish (think Juliana Theory) than JEW but they have the vocal harmony and cohesiveness of Jimmy. And their emo-ness shouldn't detract anyone, it's not like the cheesy emo kind and not whiny. Their voices are great.

They're unsigned, you can only buy their new album (out tommorow) through their website. Check em out or at least download their songs (they got 3 freebies) from http://www.purevolume.com/lastwinter/music