At this point, SBN knows there's a problem, they're just working on a fix. Please have patience; we understand how frustrating forum slowdown can be in the Forums. If anybody wants to report the problem to them directly, support can be reached at support@sbn.com. However, they currently have two open "tickets" related to this issue, so there's not much else that can be done, from the reporting end.
In addition to the requests above (that everybody slow down, keep only one browser window open, etc.), for people who frequent the game thread, please turn off the option to be warned upon others' replies.
To do this: Go to your profile, click on "look and layout preferences", and check the box that says "Don't warn on new replies made while posting."
The site can generally handle the numbers of users we're seeing. What it can't handle is several hundred people clicking refresh and/or trying to post their message (and reposting, and reposting as it's not going through due to the "warning" about replies.)
There may very well be slowdown issues not related to the above, but regarding the gamethreads, I think high activity is the culprit.