Home Back-Up Protection are selling a bed / mattress mounted shotgun rack. This is quite a clever idea!
This is what they have to say about their product:
The Back-Up is a rack that allows you to keep your shotgun or other defensive weapon within easy reach. A number of people keep their guns on a bed stand, under the bed, in the closet or standing in the corner. This is not safe and does not give you easy access to your defensive tool when you really need it. Protection is effective only when it is easily available and easy to use. Our unique patented design gives you the quick and easy access to your protective device, while not getting in the way when getting in and out of bed.
More info here.
Hat Tip: Core77