If you haven't tried it yet, I'd highly recommend giving Dropline Gnome
a try. I personally use it and love the added features that Todd (the developer) puts in. Be warned however that it will replace the standard Slackware GNOME, so if you want to uninstall it, may God be with you. That said, I think it's a superb implementation of GNOME and fills all of my needs for a desktop environment. Your mileage may vary, of course. Currently, Dropline GNOME 2.8.0-rc1
is out, but you might want to wait for the final version unless you're willing to file some bug reports. Hope that helps!