I've played the HPB_bot in TFC before the waypoint system was created. And I used to be a HPB_bot Waypointer(I still am when it comes to HLDM and DMC Maps). I'm a BIG, BIG fan of the HPB_bot. And I would hate to see it just fade away.
The HPB_bot is what made Bot Multiplayer Gaming in HL possiable.
I would help to maintain the bot, IF I knew how to mess with the source code.