I think one thing we really need to do with this site is update the main page. Right now, if a new visitor comes and sees it, they are left thinking that the site was undisturbed since the finale. They may get turned away before they ever check out this amazing talk area.
My thoughts: First, we should put a new visitors link right there at the top of the page. Perhaps it goes to a standing page that gives an overview of the show, and an overview of what this show is about. Perhaps some of the regulars here in the OP can give testimonials to explain why, if they are die-hard fans of the show, that this is the place they want to be.
Second: To make it look even more timely, perhaps get some of the regulars to submit articles/fan fiction/musings/rumors/news/etc. related to the show, and feature one each month or so on the main page. Again, there's probably a lot of people here who'd love to contribute, and it gives the site a more current and lively feel.
That's just my one-fiftieth of a dollar.