There were some malformed URLs being requested that were generating quite a few errors in the ColdFusion logs, so much so that the log files were maxing out and being automatically moved/deleted by the server several times per day. It's possible this high disk activity had something to do with the outages. I put some error handling into the offending component so those malformed URLs simply redirect to the forum home page.

Let me know if you experience any further outages. If you do, I'll have the hosting service continue to investigate.