My personal experience has been that even unusual tech devices, particularly the smaller ones, really don't attract much attention from TSA. Possibly because they don't want to look stupid asking what a particular device is for.

I've traveled with a laptop, netbook, and a portable GPS system and never had any problems (not an eDGe yet). But they are basically minimum wage mall cops (i.e., poorly trained and educated who couldn't get a real job in law enforcement), so who knows what will set them off.