Just taking this idea and running with it, lemme know what you think.
How bout taking the 12 squares and dividing it out over the span of a year, one square per month. Each month you send your square to a different person (meaning in for Jan you send to person A, for Feb you send to person B, and you might be getting a square from person G one month then one from person H the next, and so on).
Beginners can work on simple color squares, or simple textured squares, more advanced of us can do image work/more advanced techniques. Depending on how others feel, you could try to mix it up so everyone's final piece will have roughly equal amounts of "newbie squares" and "pro squares." Plus, that way say if one person's not so advanced and makes 12 single color square blocks and recieves 12 crazy intricate detailed work, well... I guess maybe the other way to do it might be to have separate catagories for beginner/advanced?
I dunno, but the 12 and 12 thing caught my eye. It'd be nice to have a themed knit-along-swap, and spread out like that we wouldn't have to make a huge committment with a close deadline, and instead one simple (or complex, depending on your skill level and schedule) afghan square per month which seems a lot less daunting, I think. Though, it would be a greater committment over a long period of time (meaning it would be stinky if a bunch of people dropped out after a few months leaving that same number of people with unfinished throws)...
I dunno, just a suggestion.
I still haven't decided whether or not I'd want to join, I guess it really depends on the final parameters and schedule... The semester just started up again so I don't know if I could commit to anything that large unless it was relatively spread out over a bit of time.