Yahoo Site Explorer officially shut down last night. Due to this, we are quickly working on switching the link data provided in the competitor analysis portion of Long Tail Pro. In fact, we began work on making the switch a couple of months ago and simply need to finalize a few things before we send out the next update with the change. We hope to have Long Tail Pro begin pulling link data from SEOmoz.org, via their Open Site Explorer tool, by the end of the week.
Obviously we had hoped to make the transition before Yahoo officially shut down, but no one knew for sure the exact day that Yahoo links would stop populating. So, we appreciate your patience during the next couple of days while we get everything set up for the new link data.
Overall, we are working diligently on getting the link data for Long Tail Pro back up and running as quickly as possible. In the meantime, you can still generate multiple keywords at once, automatically filter, check exact match domains, and check the rankings of your websites!