PV4 was quietly released last night. This was an odd release because we did it in two releases over the course of six weeks. The first, R1, introduced the new UI to the administrative components of Blogware. R2 fixed the bugs that R1 introduced, cleaned up some of the interfaces and added a few new features, some of which we've already commented on.
Rather than try to enumerate the complete list of what has been done, I'm going to focus on the actual final release itself. We still have to go through PV5 which will bootstrap the provisioning systems that resellers will need and PV6 which is intended to add two highly important, but super-secret features, and a ton of small improvements in anticipation of the full beta.
In the meantime, enjoy the tool and keep filing those bug reports.