Well, I can give you the problem and the market. Also a market that is already looking for such a solution.
School kids.
Here in Hong Kong there is a serious problem with the weight of school kids bags. They are heavily packed with books. On average a 7-9 year old carries 20% - 30% of there body weight. Several kids have been killed due to this weight causing accidents. They need the books for homework as most kids have upto 2 hours of work each night.
The solution is a low cost and workable system that can be used to store the text books in digital form. Compatability is not really a big issue since work can be transfered using HTML, Jpeg or simple text.
The key factor of this would be to organise production of PDF text books that are used by the Schools.
The specs of the machine need not be big. A 1024 x 768 12" screen, Mobile Radeon, 256 ram.
