If we have a PHP-GTK forum then we should have a Pear forum
like jstarkey said, PHP-GTK is a huge jump for PHP. Pear is no-bad but its nothing compared to PHP-GTK.
not many people would benefit from a PHP-GTK forum
why do you say that? sure PHP-GTK is new-ish but there are hundreds of good,bad and down right stupid php-gtk programs around and more are created everyday so the number of developers must be quite large.
This isn't just an extension like pear, gd, ircg etc... This is an evolution, so far its the only extension (that I know of) that brings PHP off the web and onto your desktop.
Sure its not as good as ANY other desktop programming language but it has potential.
P.S. btw, last time I checked, Smarty was a Class.