openSUSE 11.0 RC1 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_11.0_dev before you start your installation.
Since there are just 5% of the features tested, we still ask all of you to check 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_11.0
Further information on testing are available at http://en.opensuse.org/Testing
Looking forward to your feedback.