Two 125x125 ad blocks available on SwollenPickles.com (sold through project wonderful). Both ad spots are above the fold, and SwollenPickles.com is generating over 1,000 unique visits daily. You can check the stats etc here: http://www.projectwonderful.com/advertisehere.php?id=10486&type=4 Bidding starts at $0.80 per day.
All the info you need can be found here: http://www.projectwonderful.com/advertisehere.php?id=10486&type=4 If you haven't heard of project wonderful before you should check them out. Here's info on their auction process: http://www.projectwonderful.com/advertisewithus.php