Test universe updates using -proposed repositories

Before a package can enter the -update repositories (dapper and edgy), it will be tested by users using the -proposed repositories. So do not use these repos if you do not want to deal with a breakage ;)
Current package lists awaiting tests and repositories to add to your /etc/apt/sources.list can be found on a dedicated ubuntuforums thread that will be updated by StefanPotyra. Thanks Stefan.