Yup, Bill worked for GM in the 90s, first as a game designer then a writer. He got me into the WFRPG, and was our GM for a while before he moved to Prague. One of the joys of my life was walking around Ann Arbor with him, talking about doing a Seven Slayers book (it later became Dragon Slayer) and whether he'd be able to get Horny the Dwarf past GW's editors...