Finally, after one full month of development, Pat released a massive update on Slackware-Current today. It's a HUGE updates, it's like all packages are being upgraded. Toolchains are also upgraded, so it's likely to be a good base for Slackware 13.1.
Now Slackware uses Linux Kernel 2.6.33, KDE 4.3.5, XOrg 1.7.5. Full detail can be seen at the Changelog