In the world of photography you need to be ready at a moments notice, this need for readiness usually comes with many different cameras hung from the shoulders with an arsenal of lenses also in the mix. While this provides a camera for every thing that may need to be photographed it may not provide the availability that is needed.
The RStrap from BlackRapid is an attempt at making the camera more available while still encouraging management of cameras on straps that are held over one shoulder. Check it out, if you are a sports photographer or ever carry more than 2 cameras on your shoulders I think that you will appreciate their product. http://www.blackrapid.com/
Here is a quick demo video on the RStrap.