It is. The issues were due to one client. I've been working on this nearly non-stop.
Unlike Proboards, though, I have actual, /direct/ control over the server that this forum resides on.
What happened was a regular weekly maintenance script that optimizes and repairs ALL databases on the server choked and died on a client's SQL.
It subsequently brought nearly everything down. I was able to bring it back since it was still online, just responding very slowly via SSH. That done, I set about fixing the issues encountered. It took over 5 hours to fix because of that one goddamn client of mine.
All's fixed... as for the recent outage, it appears one of our datacenter upstream peers up and died from the traceroutes I was provided during the outage while I was sleeping because during the entire ordeal, I had little to no sleep. :x
I'm fully rested now, though, so I'll be keeping this server under deeper monitoring until I'm absolutely sure the server's 100% OK.