I'd like to see a "DreamWho" program. Point it at the PID of a running DreamDaemon, and it outputs the users + IP addresses in a nice list. That way, I can write a system that dynamically modifies keyban.txt/ipban.txt to keep a particular user out.

(Or maybe a DreamBan command which allows you to use the new DD banning under Linux: point it at a PID, specify a key to ban/unban, or tell it to list existing bans or current players online.)