It used to be that you only ever needed to print when you were at home or in the office. The proliferation of mobile devices as well as the lifestyles, both personal and professional, that go with them have also turned printing into an "on the go" necessity. But heaven forbid that you have to lunge around a desktop printer just to get a document or a photo printed from your pocket-sized smartphone. Enter the WorkForce WF-100 which Epson claims to be the smallest and lightest wireless portable printer. At least for those under 400 bucks.