Just like the original Handstand, Handstand for iPad2 is the best solution for one-hand operation that I have tried.
It’s tough to get on – my son, Wil, put it on for me and said his fingers literally “hurt” after he was done. It also damaged my screen protector around the on/off button, which is not good. Wil recommends that you put the bottom on first to avoid that problem. It was easier to get off than on.