I just noticed this so I felt like I had to respond. I can only speak for myself, but it's tough to keep up with the contests at times due to lack of entries/activity. Perhaps the mods share some blame in what topics we select, then again we are picking from user-generated lists.

There's also been a lot going on IRL for me lately. I believe the other 2 mods are in a bit of a transitional phase themselves.
However, this is no excuse and we
are looking for moderator positions to help out (hint hint everyone). We've also been looking for ways to increase contest traffic -- as always any and all suggestions are welcome. As for this week's thread, it's halfway through the week so perhaps it's best to wait until the weekend for a new one. I promise one will be up by Sunday night.
The contests are numbered, so whichever is the highest you see is the latest. You can also perform an SO-only forum search for the keyword 'contest' to bring up the photo threads exclusively. But yes, we need to do a better job of locking old threads lest they be bumped by people asking 'LOL am i 2 late guise.jpg'.