Hey John, I just noticed your call out (on livejournal) for a suggestion for an online HotBlooded chat - I think your best bet is to get an IRC applet set up on housesoftheblooded.net and have it connect to an already-established Internet Relay Chat network and join your room.
This means you don't have to run a chat server, or fork out money for someone else to run it for you. It also means that many players (like me) can use our own IRC clients if we so choose.
As a side benefit, players can create a nigh infinite number of rooms for seperate games, separate rooms in a castle, out of character chatter, etc. just by joining a room that doesn't exist yet - the room is created on the fly.
My favorite applet for IRC is free; it's called Mibbit; check it out at http://www.mibbit.com/
Edit: If you go this route, i'll be joining you with a close to 24/7 presence from X-Chat (my local client of choice)!