Cool idea!
That said, here's a quick question: Since the assignment submissions tend to be a mix of "I dug this one up from my library" shots and "I shot this one new with this assignment in mind" shots, are you requiring any one of the two (or either) for the competition? In other words, are there any regulations about the age of the shot specifically for the competition? Probably tough to regulate I realize, but just wondering so I know what I can or cannot submit.
I try to treat assignments as ways to get out and try new things (hence, take new photos specifically with the assignment in mind), but of course not everyone always has the time or means in any given week to submit something new.
Once again, nice idea...looking forward to it!