iPad 2
Below is what I use in addition to the iPad for any typing intensive activity when I'm on the road. They work great together.
Apple Wireless Keyboard(already have it for my mac, so i just take it with me when I need it):
http://www.amazon.com/Apple-MC184LL-...d_bxgy_e_img_b
Incase Origami Workstation for iPad 2 and iPad:
http://www.amazon.com/Incase-Origami...9566437&sr=8-3