I've been poking around the board all day as I can. Some good conversations going on if you ask me. Well, I posted a reply and upon being redirected back to the index, it appears the main forum index vanished.
I can still access the sections via the large gray box at the bottom of the page, but the forum index (which is ever so useful for browsing) seems absent. I can see the featured video and profile, followed by a quick quote and a daily cartoon/quick tip, and then it goes right to forum stats and upcoming events.
Can't say I've come across this before on any of my other forums, although I'm not ruling out user error, either. 
EDIT: From this page, clicking on the sub-category "Community Center" does propagate the entire sub-section of the forum, with NMI, OT, Ask an Expert, and Scripts. Just no main index displaying.
Thanks!