After seeing John's post about Macromedia weblogs, I took a closer look at the site and found
this page. It look like they are attempting to replicate what you get from Weblogs.com. The problem is that they are using Cold Fusion on the backend, which can't scale to meet the demands of hundreds of thousands of weblogs pinging it with updates. Furthermore, the list appears to be dated or not yet set up to receive pings.