Preparation for an Appropedia Jam
Confirm the time - make sure some reasonably experienced Appropedians will be there.
Confirm a chat tool.
Set up the Etherpad beforehand - just tidy or empty it.
Announce
By mailing lists, Twitter, FB, A:Village pump.
Face-to-face Appropedia Jams
Arrange a place with accessible wifi (or enough ethernet cables).
Start with some "definites" - people with a solid reason to be using Appropedia. E.g. students using Appropedia for writing up their assignments.
Make a page - e.g. Appropedia:Appropedia Jam/Arcata for jams in Arcata, California.