http://www.createblog.com/forums/index.php?showtopic=211480
Our design staff has put together a new set of guidelines for people to follow when making submissions. Please give it a look, especially if you have any question as to why a submission of yours might have been rejected. This is a good way to get an idea of what our staff members are looking for (and what they don't want to see) when going through the queue.