Webunload is still fairly new, but I am looking for a few first advertisers to help fill things up. The site really only went live 2 weeks ago, so there is no PR and visitors are very low (only about ~2,000 unique at the moment). But, because of this, prices are going to be extremely affordable.
You can grab a 125x125 banner ad (on just about every page) for just $10 for 2 weeks. There will be 4 ads shown on each page.
If you are interested, please let me know.
Regards!