It was not announced with a lot of brouhaha, but there is a significant change on this Slackware page: http://www.slackware.com/packages/. As you can see, the old (and seriously outdated) Slackware Package Browser (PB) has been replaced with a new one, developed by Mario of slackverse.org.
Please check out the new PB at http://packages.slackware.com/ and give your feedback. Robby Workman has been working hard behind the scenes to create a Slackware mirror infrastructure based on MirrorBrain and the new PB hooks directly into this new mirror infrastructure. A big hooray for both Robby and Mario!
On a related note: if you are willing to setup and maintain a Slackware mirror that should become part of the new mirror infrastructure, you should definitely check out the mirroring guidelines.