We've just put beta 2 into the Members Area for download. While there are still a few bugs that are being worked on this fixes a wide variety of those that have been reported.
Upgrading from beta 1 is very straightforward. Just upload everything in the zip except for the includes and cache_builders/custom directories. These 2 directories contain information that is specific to your install and should never be overwritten unless an upgrade specifically asks you to do so.
