Thank you to Frank S for sending this in, otherwise I never would have known about it!
We all know that the new Canon 6D has a built in wifi transmitter to allow for wireless control with the EOS Camera App.
But what if you camera doesnt have a wifi transmitter or access to the wifi plug in? Apparently this will work with most modern DSLRS:
Cost is $300, which is a bit steep, but it is cheaper than needing to buy a new camera. I would imagine prices should come down on this with time.