Okay, we're back, and seemingly none worse for wear. What happened was I ran an SQL query to repair our "most users online" number, date and time after it had been erased by the "total member count excluding banned members" modification I had recently installed. I followed directions and I still don't know why it didn't work, but it ended up corrupting EVERY datasource field in the database. o_o A helpful member of vB staff (when he got the time) went in and rebuilt all our datasource fields and now we're fine. I also just ran an update to the newest vB version, so some modifications are still not working (such as favorite smilies) but I'll get to it.
Sorry for what happened.
It was my fault, I just didn't know anything bad would happen.
At least our most users online is back to normal? Lol.