Connection issues. The forums seem to be refusing to get a connection on random intervals. They'll stop connecting all of a sudden ('did not get a response from the server' or something similar) and then they'll start working for a bit but then they might go down again.
I haven't gotten an estimate for the length of connection loss, nor do I know how often it occurs, but according to Skype it seems some other people connect just fine while I'm having the issue.
In case location is required, I'm over in California, USA. Vallejo in particular.