When I get a PM the only thing that indicates so is that little tiny number in the upper left corner, "Inbox: #". I didn't notice that I had a PM, and think it would be better if a little dialog box popped up that said, "(1, 2, 3, ...) new PM(s)". Then I click "ok" and I could go about my business.
Also, the drop down menu on the home page in the upper right hand corner, by the search bar. Could you include the gear review section in that menu? It would make browsing for reviews just that little bit faster. So I don't have to click "Gear" and then search, that way we could just search reviews from any page.