Following up on my previous post, here's a new status update of the whole GNOME situation.
Very soon after posting that roadmap, the two steps in the process were completed, with the ftpmasters freeing dbus into experimental, and seb128 doing a round of GTK+ family uploads. No big problems have been detected in GTK+ 2.8 in unstable, so those bits are going very well.
As soon as dbus 0.60 hit experimental, both the KDE and GNOME camps got busy recompiling their stuff. KDE 3.5.0 moved from Alioth to experimental, and sjoerd got busy in a recompile quest to make sure GNOME was installable again in experimental. The dbus 0.60 transition in experimental was done in barely a few hours, and some extra dbus-using packages have been transitioning since then.
So, what's holding our unstable upload? We first need to wait for KDE 3.4 enter testing, thus clearing the major blocker for the C++ ABI transition. The number of packages involved in this is so big it's not even funny, so it's quite complicated. In short, the GNOME team is sitting on their hands watching some C++ fun. There are a few more news bits though.
Last night, there was a round of experimental updates, bringing most of the modules to their 2.12.2 versions (just 2 or 3 are missing now), and meta-gnome2 was again updated to support these versions. If you issue your usual aptitude install gnome-desktop-environment, you'll pull newer versions of most of the stuff, if that's the way you update your experimental packages. Also, the gnome package now supports gnome-screensaver. Give it a try, and be ready to purge xscreensaver if you're happy with it!