JP, when you got the network back up, did you make sure services.antionline.com and antichat.res.cmu.edu are both using the correct hidden-hostame values? (The three above-1,000,000 numbers which allow them to show the garbled IP/Hostname info through /whois)

Apparently when you /whois someone, you get DIFFERENT host-hashes depending on the server you are connected to. This causes problems when setting bans or scripting any IP/host-related events, because the reported user-host that is recieved when you do a /whois on a person isn't consistent across the system.