Google+ isn't working

Not working here, in St. Louis, MO, USA. I was kicked off a hangout about two hours ago (haven't been able to get back on hangout since then). Plus was still working, but now I'm getting "500. That's an error." after about 20 seconds. [Edit: now getting 503 instead of 500.]

Something crazy happening in Google-land, with the earlier Mail outage (http://news.ycombinator.com/item?id=4899922), and now this.

[Edit 2: Seems like it's running again, but much slower than usual.]