One thing I keep forgetting to mention is when ever I click on My Messages and open a PM it goes right to reply with quote.
I would test it out but a little more colorful theme, that matches the logo would be cool. The demo site is cool.
Also, maybe you want to cut back on all the sections/sub headings, too. Start out small and when it gets bigger then branch it out. Look at Crankfire. Nate's kept it down to a minimum all these years.