I have built MATE packages for Salix! For anyone that is not familiar with MATE, it's the fork of Gnome2 that has emerged after Gnome3 was released and almost everyone was disappointed with it. This seems to have evolved quite nicely. It now has every bit of important functionality that the old Gnome2 had and the packages are now very stable.
Now that Gnome and all of its projects have moved to Gnome3/GTK+3, we'll probably use more parts of Mate in future salix versions, especially if Slackware doesn't upgrade to GTK+3. It would have been impossible to use newer versions of evince, file-roller etc without GTK+3, so the Mate GTK+2 equivalents that are identical to the evince, file-roller packages we now have in Salix area probably going to take their place.
Packages are here:
i486: http://salix.enialis.net/i486/13.37/salix/mate/
x86_64: http://salix.enialis.net/x86_64/13.37/salix/mate/
For everyone that wants to try it out, you can easily install all packages in your Salix with:
slapt-get --install-set mate
Please report any issues, although honestly, I think there should be none.
We're probably going to have a Mate edition soon too.

Have fun!