Alpha1 has been bundled and is available at
http://developer.postgresql.org/~petere/alpha/
Please check that it is sane.
If there are no concerns, I will move them to the FTP site tomorrow
(Sunday) and send out announcements on Monday.
If someone wants to volunteer to craft a brief release announcement,
please feel free. The release notes are at
http://developer.postgresql.org/pgdocs/postgres/release-9-1-alpha.html
We'll also need someone from the web team to stand by to update the
website.