KDE 4.10.5, the latest maintenance version for 4.10.x branch has been released by KDE team. They are now shifting their focus on working with KDE 5 even though they will keep the 4.x branch by releasing 4.11.
Eric Hameleers has pushed his KDE packages for Slackware 14.0 on his KTown repository and it's now mirrored on several servers, including my university's server. KDE packages for Slackware-Current (or will be Slackware 14.1) will be handled by Patrick himself and hopefully it will be included soon on -Current tree.
For instructions on how to upgrade to this version, please read the README.