The real point is that there is absolutely no reason why you shouldn't be doing the same to help promote your wines with people you would ordinarily travel to visit. It's not just for behemoths like K-J.
The K-J model is one-to-one video, which is trivially supported by Google Talk and Skype, both of which are free. Many new laptops come with built-in Webcams (the Toshiba I'm using right now, for instance), so the camera barrier is going away as well. If you or the other person doesn't have a built-in camera, a decent USB Webcam like the Logitech Quickcam Pro 9000 costs less than $75 at Amazon.
Anyone besides K-J doing remote one-to-one tastings with critics, distributors, etc? If not, why?