No doubt a genius, but perhaps also Woz-centric (think eccentric but with technology founding stripes), cell phone inventor Martin Cooper always likes to have the latest and greatest mobile device on the planet. Ish, according C-SPAN:
Right now I'm using the Droid, because I want to get some experience with the Android operating system, and I, so far have some favorable results.
He also likes to Tweet from it -- he's @MartyMobile if you want to follow along. In his defense, however, he did have an iPhone. He gave it to his grandson. Lucky kid!