Linhof also made 70mm backs for 2x3 and 4x5 cameras, and some of the bulk commercial portrait cameras made by Kamerz and such were 70mm long roll cameras. There was also a 70mm Combat Graphic rangefinder made for military use that took 70mm cartridges. It looked like a Contax IIa on steroids--a beautiful camera really with three Ektar lenses.
I considered getting a 70mm back for my 4x5", but film choices are really dwindling in this format. Right now, I think the only options are aerial films and Portra 160.