I just noticed that http://www.digitalpoint.com/tools/ad-network/ is PR3 now. The last time I checked it was 0. http://www.link-vault.com/ still shows 0.
It's cached from June 6th though. Long before the time it had disappeared. So we have to assume this is a roll back to try and fix something. This does not apprear to be a result of a fix, but rather a side affect of rolling back a fix that did not work.
A query for info:http://www.digitalpoint.com/tools/ad-network/ on Google still shows another site listed on some of the datacenters, though.