Now that I know when I'll be getting my 3G unit, it's time to start thinking accessories... What are your favorites? What do consider a "must"? I'd like a case but I haven't heard the best things about Apple's. I've heard that its surface is a little rough. That true? Or how are the other cases? Incase's? How about a stand? Apple's is nice but you can only prop your pad on it in portrait mode -- weak! Anything else? Keyboard dock? Bluetooth keyboard? What do you recommend? Many (if not all) of the accessories are so clearly marked up so I'm not looking to go to town by any means but I'm interested in the "necessities" and in hearing what you all think!