Me too. I'll be practicing darkroom printing during December to get ready (I currently have a virgin darkroom I just completed this past weekend) (read: Bathroom and black tape)
Ideally, I would like to do wet prints but can you also participate if you use a commercial lab or ink jet?
I'm looking forward to it
It is great fun. If necessary, you can use a commercial lab or ink jet, but the original "capture" must be on film.
Pay close attention to the size requirements of your postal system - otherwise it can end up being unnecessarily expensive.
And in response to your post on the FAQ thread, I don't think there has ever been a special gallery for postcard images, but some of us do post some of our cards in the general galleries.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2