I wanted a stand so Grandma's iPad could show family photos while it charges.
I picked up the plastic frame shown here for $6 from a local hardware store. The iPad is in the $25 Griffin case (yes, it blocks the rotation lock, the power switch is beneath a tab so I just push on the tab) folded back on itself. The power cord plugs into the right side.
It works well. It's easy to add and remove the iPad without removing the case.