After further review, and maybe I'm just not seeing it, but what happened to the option to mark all forums as read?
You'll find that option under "Quick Links" near the top right of the page.
Also, refreshing is a bit slow, but i'm sure that's due to all the folks catching up on their reading.
There's also some CPU intensive maintenance going on in the background right now...
to upgrade the server sometime in the near future... Hopefully, that'll help speed things up, too...