Is this your site? I have my adbrite set up so that if they can't fill the space for a certain CPM it will display my adsense code instead. I think many people use adbrite this way.
Yeah, it's my site, I pasted code on one page for check ads quality. Maybe do you have sites list with adbrite's ads, then i will check their quality
You can visit adbrite's site and check out all the sites that you are able to buy ads on - that will give you lots of examples of their ads. Or you can check out this image hosting website - it has adbrite ads with google adsense as the back up if adbrite cannot fill the ads for a certain CPM (check the bottom ad).
I checked "site directory" but there are only sites with graphic ads, no text. Where are sites with text ads?