That would be fun! I especially like the "art show" idea instead of a competitive one, because:
A) A good-looking pic doesn't necessarily mean a good-tasting dish, and a not-so-good-looking pic may hide a really great dish. (And I speak from experience as I run a pen-making business on the side and sell stuff at a lot of shows every year).
B) It shows off the diversity of members of this board - their styles, techniques, grills, creativity and so on
C) Competitiveness is far too overrated.
It should be all about "What could I do with this idea?" rather than "How can I win this?". Besides - this site runs contests a few times a year anyway.
And for a bonus, wouldn't it be cool if Steven or some of the rest of the staff posted an entry as well?
Weekly might be a bit much, though, as that's 52 new ideas a year and a lot of members might not want or be able to keep up. How about a montly theme instead?
The other reason I like a monthly theme is because you can really but some thought into it and do some planning, whereas weekly you might be scrambling a bit if you really wanted to participate in this idea a lot (and I know a lot of us would). And that often means not rushing through a dish or cutting corners. I for one have posted the odd dish and then thought a week later "Gee - I should have done this, or added that" and so on.
So how about a monthly or even bi-weekly theme? (And I think bi-weekly might even be the way to go here too).
BC - please send me a PM as we can possibly put together an actuall poll for our members, too.