Quote from LoRaM100
criticsquid says only 1 can edit OP. It can be transferred (not an option) but only one.
YOU have to create it!
Just add a folder to "*\.minecraft" (my XP path = C:\Documents and Settings\Owner\Application Data\.minecraft - yours will be different if not an XP), name it bin.
Psst - Right click "Start", then click "Explore". *\.minecraft is there somewhere.
Sounds like a generic OP is the way to go along with a link to a page that can be managed by multiple people.