If you export your links via the script I references above, you can import those into Blogrolling.
I fully admit that this is a very undesirable situation. Unfortunately, there has been no replies from Ping-O-Matic regarding these problems and when or if they will be solved (at least not that I’ve found, and believe me, I’ve spent a lot of time looking!).
Perhaps being more vocal about this unacceptable lack of communication and the non-availability of the service. The Ping-O-Matic blog might be a good place to post to, though any comment attempts asking these questions have never been allowed or replied to.
Regardless of who is the master-mind of Ping-O-Matic, the choice is simple: if Ping-O-Matic is incapable of providing the service it is supposed to, it should not be included in WordPress, period. Either find a service that does work or remove the option all together, so no one will have the expectation of it. Though I am hardly a programmer, I’ve been attempting to unify a few of these types of plug-ins together. There are a few older plug-ins which query things like weblogs.com or can read RSS feeds from other services, however none of these seem to work on WP 2.0.X. If there are any PHP geniuses around, I think this would be a great problem to help solve ??
Cheers,
Michael.