The World's Tiniest Printers... But Why?

Know any people who call on homes for work? I do - M visits the homes of her traveling clients to provide cat-care. The boss of Happy Home Organizers declutters her clients' homes. 

Now, wouldn't it be nice if they could drop off a business card each time to announce their presence and, wouldn't it be nice if someone could purchase space on the back of that business card to promote their business? Like Maxine might be able to promote her Self Hypnosis business?

Here's a $150 3.8" x 4.4" x 4.46" Japanese gadget that never requires ink, and uses special paper.

The HP Sprocket is something you can carry in your pocket to do 2" x 3" photos.

Now it's just a matter of time before we have this Google Adwords of private business..