Continued improvements to openSUSE 12.3 is better handling of UEFI / SecureBoot and openSUSE Live Media changes. OpenSUSE 12.3 should now play nicely on UEFI machines when YaST determines at install-time it's a UEFI setup.
The openSUSE Live Media changes are now focusing upon support for having the install media be put on a USB disk rather than a CD. With targetting 1+ GB USB flash drives, LibreOffice, GIMP, OpenJDK, and other software packages are now found on the Live CD Media. A Xfce-based Rescue LiveCD is also being made for openSUSE 12.3.
Other features of openSUSE 12.3 are talked about here, among other articles.
More details on openSUSE 12.3 Release Candidate 2 can be found at news.opensuse.org.