Mike Riddle, CAD pioneer and creator of FastCAD the software on which CC3 is based, has released a free iPad/iPhone app for FastCAD. It does not support bitmap art – only vector styles, nor does it yet support effects. It’s called CADView.
Campaign Cartographer drawings tend to be much bigger than the usual CAD drawings, and on an iPad 1, detailed overland drawings are a little slow. That said, I’d love to hear how fast CADView is on iPad 2, and get other feedback. Who knows, we might have a full-blown CC3 viewer in a year or two’s time.