Have you considered a Blackberry? Itis basically a text only device that will interface with IM and email for computers. There are a variety of these out there. I know a many of my Deaf friends use this as a communication device with friends and family. The whole things is small enough to fit into one hand and basically has a regular keyboard on it. If she is good with one handed typing this would work for her and it becomes easier since she doesn't have to remember how many times she punches a button to get the correct letter. (my daughter has that down to a fine science) This may be an option to look into.