Kickstarter - Pixo magnetic Tablet Mount
The Pixo is an interesting looking Kickstarter project to create a magnetic mounting for iPads/tablets to attach to the side or top of your desktop screen/iMac.
Currently they are quite a way off reaching their target of £60,000 but it still has some time to go and may still be able to get funded. I wish them well as this does look like a nice solution.
Checkout their site for more details.