Yeah the native Lumix lenses are really the only game in town for the AF-100 as far as electronic control is concerned, too bad they have yet to design a lens optimized for video work.
I have a Zeiss Contax 45mm f2.8 Tessar pancake lens, but you know, I enjoy a lens that has a little meat to it rather than all close together where it's harder to access the controls.
Pancakes are for breakfast. Those little lenses and my ham fingers don't get along well together, unless working on a short entitled "The Invasion Of The Fingertips"