-Left side and right side bars on your portal need to match. I like the way you've done the right side of your portal, so I'd do the same to the left.
-Your style is quite nice. However on your forumhome, you have a box with nothing in it. May only be viewable to guests, log out and you'll see.
Otherwise, very nice.
I agree with everything this guy said and in addition, I would use a stronger gradient and/or border on your navbar...
It looks like the buttons are just floating in water.