Check out these guys here, some of my favourite unsigned bands that I've worked with recently:
http://www.myspace.com/hollowpointuk
http://www.myspace.com/darkestofperu
I was doing a shoot for these guys last night and they were the best unsigned band I've seen for ages!
http://www.myspace.com/merciadrift
You also might want to check out these guys:
http://www.myspace.com/thedeadclass