Need Your Help - My Forum Design

[Cain]

I could really use everyone's help. I'm making a tutorial site for beginners and intermediates. I really want it to look good. Some screenshots are attached and the link is

http://frozenigloo.co.cc/forum/

^ If it doesn't work at first, you may need to refresh five times.

I really need your constructive criticism.

Do you think it should be green or blue? (Or any other color, please tell)

I obviously need a banner improvement, but what should the banner be about?

Please post anything else you think I could improve on, any comments will be appreciated.

Thanks in advance.

Cain