We got a Fire for Android app testing on small form-factor tablets. For our purposes we immediately rooted it, so YMMV, but we find it a nice form-factor that is still quite portable.
Bigger than my Samsung Charge, but smaller than our iPad.
Like the iPad, it could be used to remote via LMI, or a web presentation of your desktop, but neither is a good fit for doing full charting.
If you are looking for something small and light I would consider the ASUS Transformer Prime.
http://www.amazon.com/Transformer-T..._8?ie=UTF8&qid=1324250759&sr=8-8 The ability to add in the docking keyboard and additional battery make it a viable laptop replacement choice.
Or to keep your costs down [$350] and get a larger screen a ChromeBook:
http://www.amazon.com/Samsung-Wi-Fi...mp;ie=UTF8&qid=1324250982&sr=1-3It's like I have said before, the options just keep getting better.