If you login to your Google My Business listing area and look at the manage locations tab (which is the default page most go to when they login) - you won't see any listings. There is a bug hiding them, they are invisible, but Google is aware of it and will fix it.
Here is a screen shot of what I see:
There are numerous complaints about this online but a Local Search Forums thread has someone who said they spoke to Google who said this is a bug. The Google support team told him this was a confirmed worldwide bug. He said Google is working on this but there is no estimated time for a fix. He said the listing didn't disappear they are "invisible". "And as well, when they fix this problem, every listing will show up with no suspension or any other problem," he added.
Like I said, there are tons of complaints about this across the web, you are not alone.
Forum discussion at Local Search Forums.
Update: 8:30am ET it seems to be working again for me.
