While this is a good step in the right direction, it seems that it will take a while for this project to stand on his feet. The status page shows that the required infrastructure for an open source project isn’t available yet. The nightly build link at the getting-the-source page leads to an 404 message which contains info about how to purchase a license.
The download links use the word free (as in gratis) , and show a non-free (as in libre) license. Quite shameful after reading the “we’re going open source” announcement.
On the other hand, the source code is already available on the SVN, including the appropriate GPL headers.
To conclude, it seems that the release announcement was a bit too early, and it might have been better to build some more infrastructures for the project first. But it will be very interesting to see the blogoshphere hitting up while MovableType and WordPress compete, and hopefully also cooperate.