I like my Mobius much better than my two 808 key chain cameras, but the one draw back is that the Mobius is twice the weight of the key chain cameras. I am working on various diy camera mounts during the same time I am building my Cub. None of the mounts have actually been tested on it just yet, so I can't swear as to how well they work or not and how much they will effect the flight characteristics of the plane. The Cub is a trainer, so it probably has a lot of flex in how things effect it, but one never knows.
Any rate, all of the mounts would work equally well with the Mobius or the key chain cameras. Here is one of my flickr sets to show some photos of the mounts in case someone else wants to try making some and test. Personally, I believe the foam and tube mount show in the later photos will work best and have other mount locations to boot.
Here are some Mobius mounts in addition to the above link photos: