Patrick has included just-released Mesa 9.1 into -Current along with some other changes. Phoronix has an article about this release along with most of it's interesting features. I think next Slackware release will be GPU-friendly for most modern system out there.
Several basic applications such as coreutils, git, and fontconfig are upgraded to the latest version and a single font for Chinese characters is also upgraded as well.
XOrg Server and xf86-video-openchrome are being rebuilt to fix some problems and include upstream patches.