Michael:
It has only happened on two or three occasions to me - it typically worked like this: I loaded the front page fine, but then if I clicked on any forum, it hung.. OR, I got the forum and clicked on a thread and then it hung. In all case, I could replicate the problem immediately, but not necessarily w/ same forum or thread selection.. and then when I would come back later, it seemed to have cleared up. Not exactly a road map to the problem, is it?
For what it's worth, I couldn't access the site at all earlier this morning for at least two hours..