I'm sure they'll be adding full GUI support soon and it should be cross-platform compatible so you get basically the same thing on all 3 platforms. It's personal preference whether you think a native gui is best for setting preferences, that's part of your design philosophy. But yeah, I definitely think BlitzMax is a great language to do ANYTHING in and it'd be really nice to be able to create and manipulate fully capable GUI's in the native style, to create apps, editors and the like. They could even include embedded quicktime or opengl areas as part of the app. That'd be nice.