I've been using my iPhone 4 as a satnav but I find the screen too small just as I do with Tom Tom units and other stand alone units. I bought my car last year and for the navigation equipment Audi wanted around £900 which is ridiculous. I've seen some dual suction iPad car mounts which attach to either the window or the dash which would be great for navigation apps and for adding appointments that I receive over the phone while I'm out. Has anyone else mounted their ipad in such a way? Does it look stupidly oversized?