Please report any feedback/findings in the comments.
DISCLAIMER: Install at your own risk. This is Leaked/Beta software that is not guaranteed to be stable, and therefore will not be supported by RIM or your wireless carrier should you run into some problems. As a precaution, if you decide to upgrade, it is highly recommended that you make a backup before using this software. If you are not comfortable using Leaked/Beta software you should probably wait for the next official release. *