Unfortunately we seem to be having a fairly widespread outage right now since about 5am this morning.
I've only just found out, so I don't yet have all the info, but it appears that most, but not all, bigpipe customers are currently unable to connect, but wanted to post it here to make sure you guys know we are looking into it as top priority.
I'll post back here as soon as I hear anything more about the reason and an ETA.
It's all fixed now.
have edited the thread title to be more up to date :D