I've used the Belkin case and am now getting the Zerochroma cover for ipad2. I really love using my Fling which is a joystick for the iPad. It's buy Ten1 design.
I love my custom stylus holder. My targus case did not come with one and I hated the idea to get rid of it. The custom stylus holder just slips on my case and does a great job!
If you want to use the Apple Wireless Keyboard it's a valuable asset. Protects the keyboard when traveling with very little bulk and serves as a very good typing stand that supports both orientations, the iPad or iPad 2, and either naked or with a slim cover/back protector. Very functional.