Power's been restored and I've spun the servers up again. You'll need to re-add to your favorites I'm afraid. RED and BLU are both back to being standard servers. I've switch Event ORANGE over to all halloween maps. Event BLACK is still running the koth_lakeside halloween map only. Here are all the server addresses:
RED - bpub.dyndns.org:27015
BLU - bpub.dyndns.org:27017
Event ORANGE - bpub.dyndns.org:27045
Event BLACK - bpub.dyndns.org:27047
MvM PURPLE - bpub.dyndns.org:27025 (manual join only)
MvM GREEN (matchmaking-enabled)
MvM GREY (matchmaking-enabled)