Haven't seen much in the way of an actual forum game lately, so I thought I'd get one started. BPT is an oldie but a goodie. If you haven't played or heard of it before, it's similar to the game "Telephone" (or "Broken Telephone"), except modified for the purposes of playing it as a forum game. Like the original game, the OP comes up with a sentence or a phrase. If you receive a text description, send back a picture. If you receive a picture, submit a text description.
Here's an example: http://abysmalminton.org/random/bpt/round2b.html
If you're interested, sign up here!
Edit: I'll start the game once we have a good number of people (8+). You can continue signing up until a day or two after the game is under way.