While the Spider Holster was developed specifically for SLR cameras, I can see a lot of potential here. The idea is to take the weight of the camera off of the shoulders and transfer it to the waist. The Spider Holster consists of two components. The SLR is modified with a pin in the tripod port at the bottom of the camera. The pin slides into a slot on the holster that holds it in place.
Check out the Spider Holster online.