holding a digital camera? DH just bought me a new camera for Christmas and I think I'd like to get a wristlet to keep it in if they're big enough. It seems like most of the ones I've looked at have the dimensions 7" x 4" which sounds big enough. Do any of you use a wristlet as a camera case, and if you do how does it work out? Is it hard to get the camera in and out? Does it protect the camera? TIA