xfce 4.4 beta 2 - looking good!
Wonderful news - I've *finally* figured out at least one way to fix the problem I've been having with icons for kde apps not displaying on the xfce menu. An updated package is available, and details on the "fix" are available in the Change Log.
On another note, we're shooting for an official launch of the SlackBuilds.org project sometime next week, so wish us luck! :)