openSUSE 11.1 Beta 4 is official announced now. It is available at http://software.opensuse.org/developer
Please have a look at http://en.opensuse.org/Bugs:Most_Annoying_Bugs_11.1_dev before you start your installation.
Again we ask you to test if new features are working as expected. Those we created a wiki page containing a list of features at http://en.opensuse.org/Testing:Features_11.1
Further information on testing are available at http://en.opensuse.org/Testing
I also attached the announcement mail from Zonker.
Looking forward to your feedback.