The primary freeze date is today.  You can get the relevant frozen
stacks by running:

apt-get install ros-fuerte-desktop-full

The freeze is very important due to the schedule slip.  As a helpful
reminder, odd-numbered minor versions, such as 1.7, are used to
indicate unstable development versions. Please release with
even-numbered minor versions, such as 1.8, to indicate that the stack
development is now frozen.  FYI: ros_comm is being held at a 1.7
unstable version until some remaining integrations issues with roslisp
are fixed.

Please make sure your release scripts are up-to-date:

sudo pip install -U rosrelease

Links:

http://ros.org/wiki/fuerte/Migration
http://ros.org/wiki/fuerte/Planning

cheers,
Ken