The update has resulted in 73 new entries added to the doc/CHANGES file; of these, 2 are new packages, 70 are package updates and 1 is a removal of a meta package. Quite a bit, eh? ;-)
Unfortunately, not all the official components that form the GNOME Desktop are in pkgsrc yet; these include gnome-nettool, gnome-system-tools, gnome-volume-manager, gnomemeeting, vino, ximian-connector and evolution-webcal. This is because I have had not enough time to work on them, and I expect they'll carry multiple portability issues. If you want to help, there's always pkgsrc-wip where you can add any of these missing packages!
Now, to install this new and shining GNOME release, just get into pkgsrc/meta-pkgsrc/gnome, type make install and you're done! Oh, and in case you don't know, this is not restricted to NetBSD; you can use pkgsrc even under Linux!