OK, MySite 5.x.2-beta4 (the final frontier) is out and will be the final public beta before the next release.

Download the beta from drupal.org and please file issues there. (Note that the beta requires an update for current users and installation of the jQuery Update and jQuery Interface modules.)

You can also see the online demo and a preview of the developers API documentation, which will make it easier for you to extend the MySite module.

To do before the final release:

1. Finish the documentation
2. Fix any reported bugs (currently there are none)

And, on a side note, greggles just released April’s download stats, and the MySite module (v 5.x.1.10) cracked the top 100 at number 95 with a bullet. :-) Acually, if you only count contributed modules, MySite comes in at #59.