Good evening:

I know that I am probably jumping ahead in the game, but I would like to know if or when this package might be available for yum download?

As from this release notice, it has been available and stable for a long time now!

http://mail.gnome.org/archives/gtk-devel-list/2011-February/msg00020.html ...

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Sincerely yours,
Rob G. Healey