Packages for xfce 4.4rc1
Well, after much discussion on IRC and various other places, I've got xfce 4.4rc1 packages for Slackware -current built and posted here.
I'm not extremely happy with having to do this, but I was more or less forced to build xfce against dbus and dbus-glib (which required building those two and getting them working). Brian Tarricone (the xfdesktop maintainer) implemented a new Trash icon with some interactive features (for example, an "Empty Trash" function), which depend on dbus. Unfortunately, he's not finished with the code, and he's been away on holiday for the last week or so, and the current state of the code does not allow one to disable the dbus dependency. I've explained it in a bit more detail in the ChangeLog, so read through it if you want more information. The main thing to keep in mind right now is that you MUST install the dbus and dbus-glib packages available from the main package link above, or you should build them yourself with the SlackBuild scripts prior to starting xfce. Regardless of which route you go, make sure you follow the instructions for dbus setup.
This dbus issue should be resolved in the next release candidate of xfce 4.4, so I'll hopefully be able to offer a build without requiring dbus next time.