
Secretary allows you to set and manage todo lists and reminders using a villager masquerading as a secretary.
As a player, you can:
As an admin, you can:
Just drop the Secretary-1.0.1.jar file into the Bukkit plugins folder and start your server.
There is lots of in-game help for the commands, type /secretary help to check it out.
Video

/secretary tp command to teleport to the secretaryv1.0.3 - Built against latest Bukkit dev build 1.3.2-R0.2 (Build #1541) v1.0 - Initial release
I'm no Java programmer, so feel free to download the source file and offer me some tips on optimizing the code, or just reuse it for something else :)
Shameless plug: The texture pack shown in the video and screenshots is from the upcoming Bromley Massive Vector pack (currently WIP). Look out for it here: Bromley Massive texture pack
Shameless plug number 2: Check out my other plugin 'Profession' - it allows you to change the professions of villagers by right-clicking on them with an item in hand. Bukkit dev page for Profession
Shameless plug number 3: For all the Doctor Who fans out there, another one of my plugins: TARDIS