Don't worry, neither can anyone else. They have roughly 5 1/2 hours left of expected downtime, but it usually never lasts that long. Check every half hour to see if the update server is up, but unless we're still twirling our thumbs after it passes the expected downtime that they announced, please don't [censored] about it.
At the top of the forum, Click [My Home]. Scroll down to [Main Configuration], and on the line that says [Personal information, email, password, etc.] click the [Edit] button. Should be able to do it in there towards the bottom. Its after where you can edit your Sig, and such.