Yeah, sounds cool. I have seen this before. I like how they're interested in leveraging these machines for low-end computing devices. I just think of how, in the US, a "cheap" computer is maybe $400 or so. But a 65c02 computer is going to be less than $10 if you do it right. However, in order for these kinds of platforms to be useful for learning, it will need the following things:
-Storage medium with easily available, swappable storage. In this way, storage can be cheap and a "sneaker net" can be established. Removable media like floppies is a MUST HAVE item for places where the internet isn't available.
-Built in programming language, and an easy one at that. BASIC would fit the bill.
-Easy to understand manuals for programming the thing: I'm thinking like the beginner-styled manuals that came with every Apple II computer
-The ability to run off batteries and not just AC (for areas where wall power isn't available)
-Hardware expansion capabilities. Especially DIY friendly ones. So you can have things like printers, extra RAM, etc. So that these machines aren't so crippled, and will be usable for things other than educational videogames. Think not just of the children, but the impoverished adults who would like a computer for doing WORK.