looks nice. a couple nitpicks though. I would remove the hover image on the navbar or change it. The black gradient gets lost in the background image.
And this is just a pet peeve of mine but I hate when navigation menus take you to other website, open new windows, open mail programs, etc. You might be able to integrate the forums or edit the forum template to have a copy of the website banner and nav. Or you should be able to put a login page and then re-direct to the forum. That would OK since you are already in a page and it isn't such a shock to be re-directed.