The nice devs at siduction have just made available a release candidate for the upcoming siduction 2012 - Riders on the Storm. An interesting part of this release is that Razor-qt, a new lightweight desktop built on QT, is now going to be a regular option for image download. Just the thing for those who liked KDE3 but have issues with KDE4. siduction-Razor-qt uses OpenBox as it's WM, but it can use any WM (inctuding Kwin). I installed the original Razor-qt beta in VBox and was impressed. While it's not finished yet it was still very usable.
Siduction 2012.2 is shipped with 4 Desktop-Environments: KDE SC, XFCE, LXDE and Razor-qt, all in 32- and 64-bit variants.
Release notes here.