Its called MeetingTomorrow.com. As Seth Godin describes it, they are yet another example of the "netflixing" of America.
Here's how it works: You need to make a sales or business presentation on the road. Instead of lugging all the audio and video equipment you need onto the plane (or risk it being used as a discus by the people who handle checked luggage), you just rent the equipment through MeetingTomorrow and have them ship it to your place of meeting. Then, once you're done, you send it back in a FedEx box.
Prices that I saw seemed to be less than if you were to rent the equipment through a hotel, and it certainly saves the hassle of shipping it and risking either losing the equipment or having to carry it from flight to flight.
In the right situation, this could be a great service for sales pros needing presentation solutions on the road.
