I have an 'original' Acer netbook, can't type on it, the keyboard is too cramped. I wouldn't advise trying to write on it. Like this: http://www.amazon.com/Acer-AOA150-14.../dp/B001EYV9TM
You'd be better with a full-size keyboard (maybe that's what you are looking for).
There are some great ultrabooks - (I got a Dell 14z early this year, it's great - not quite an ultrabook - but purchased primarily as a mobile writing machine). http://www.dell.com/us/p/inspiron-14z-5423/pd
There are also Chromebooks if you are are using it just for writing/surfing and have wifi available where you will use it. http://www.google.com/intl/en/chrome...&utm_medium=ha