This is going to be, for the most part, a monthly thing. First of the month (or right at the end of the last month), a theme will be announced. By the last week of that month, all entries must be turned in. So that's three weeks to get stuff in and one to vote, though we may be shortening this, depending on how well this one goes.
Pretty much anything is go - poetry, prose, script form, etc. for writers; drawing, painting, spriting, etc. for artists. PM Kas or me if you're not sure.
LIMITS
Small and short tend to be best for these things; prevents scroll breakage and tl;dr.
Under PG-13 without warning, R with.
2000 word limit on writing. IIRC, that's eight pages in Word, double-spaced.
Pictures - don't break the scroll.
Each entry should have its own thread with a subject title: MONTH YR - TITLE
Example: "December 08 - Winnar"
The last week, all the threads will be locked, and a poll will be started with a link to all of the threads in the OP.
PRIZES
The winner will get a sig banner like this

except there won't be a GIMP window, and the year will actually be right. Also, the explosion will actually be an image somewhat relevant to the theme.
They will also choose the next month's theme by PMing Kas or me.
This thread will be locked and edited each month with the new theme. A separate thread for questions will be made.
Dec. 08 - Forum Christmas
January-February 2009 theme - "Double Entendres"
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