I have put up an alpha release tarball for download. No documentation and lots of stuff still missing, but if you want to see what it's like you can get a pretty good idea. This release contains the same code running this site.
As for performance, there's a hidden counter at the bottom of this page. It's now showing total rendering times for the home page of 0.03 seconds, not bad for an overworked old Celeron 900 running tons of other sites and stuff (some of which pretty heavy like spam filtering). And there's no caching anywhere in the app yet. Contrast with 0.28 seconds using the WP frontend files against the same DB, after having removed calendar generation.
Testing comment spam detection