I think the logo on the top should also have something that indicates that it's clickable. I gotta think that a lot of people might find this site through its forums first and not even really know how to get to the main page or whatever, or some people might not know that the button at top leads them back and forth from the forum and the main page.
Just a thought, like this one could easily have like a speech bubble with "Click me" in it added.












