My friends and me have recently started a GorkaMorka revival. Every faction is represented. We have a trukk full of Diggas, some gobbo-powered boats full of Rebel Grotz, a Morker Biker warband, a Gorker trukk warband and I'm playing with the Mutie Raiders.
One thing I love about the Muties is that they are actually mutated Imperials. They do not remember this, but it shows on the models I made for them. Here and there, you can spot some Imperial designs, such as the Aquila, an Imperial Guard helmet, the gunz are Imperial. The Keeper even has a Tech-priest robe.