From: Pittsburgh, PA
I do know the server that the forums have been running on has been hitting the occasional speed bump. I've run into it myself. Typically, when this happens, I just hit "refresh" on the top of my browser and my post finishes posting.
We're working on some back end stuff to improve speed not just for the forums, but the site as a whole. Once our process is done, we'll then be able to migrate to even faster servers, which will again be a speed boost. Not official ETA yet on when this will be done, but likely before Spring 2011.
Get out of the vacuum and express yourself!