GNOME 2.29.92 packages have been uploaded to the Archlinux FTP. To use this repository, you should add this as top repository to pacman.conf:
Include = /etc/pacman.d/mirrorlist
The packages in the repository have been built in a chroot with testing enabled. Dependencies are mostly versioned. Anyone who’s willing to help on spotting potential bugs, please submit them to our bugtracker. We also have a gnome-unstable thread on our forum
Have fun testing these packages.