Scotland's Distance Lab is looking to test out Mutsugoto, which involves installing an electronic light system in the bedroom, this summer. It's a tough concept to explain, so here it straight from the Mutsugoto website:
A custom computer vision and projection system allows users to draw on each other's bodies while lying in bed. Drawings are transmitted "live" between the two beds, enabling a different kind of synchronous communication that leverages the emotional quality of physical gesture.
You really have to see this in action in order to actually get it, as it's kind of a spacey concept. Here's a video:
Mutsugoto from Distance Lab on Vimeo.
In other words, the system tries to introduce a more complex feeling of "touch" to long-distance communications than is normally found with phone sex (i.e. wanking it). It's an interesting idea, but I have a feeling many people are going to find it a little too "touchy-feely" for their liking.