The site actually went down and we were on our backup server for about 25 minutes while our host's webguru got off a subway and got to a machine. Seems like it was an apache failure, but he's still looking into it. We don't think it's anything we've done, but we've been doing a lot this week! We're rolling out changes for the next 14 days straight so hopefully that's the only time the site will go down. Sorry for the trouble!