My request is for a plugin that logs all chat to a MySQL database (This was previously done in hMod TrackPlayerChatPlugin). It would be great if it also logged all the server say commands as well as chat coming from CraftIRC. I guess I could just request CraftIRC to log everything to MySQL, though I don't want to over-burden anyone.
I think BigBrother does this. Correct me if I'm wrong: http://forums.bukkit.org/threads/bigbrother-log-and-rollback-potential-griefers.166/