I think I found a good dock for the iPhone 4: http://www.amzer.com/Amzer-iGlobe-Charging-Dock-P88125.htm If you look at the second picture, the part that plugs into your phone has a sliding mechanism to work with different Apple products. The description says it will work with a case on. Has anyone tried this one with the iPhone 4? If so, how well does it work? I think I might have to try this one out as I am buying a bumper, though it is a bit pricey at $35.