We've currently funded 146 laptops over the last few months, but we'd love to be distributing thousands every year and are currently in conversations with a variety of companies to see if we can get sponsorships going. That would potentially allow us more flexibility around what machines we use.
You guys should work with CodeDay (http://codeday.org) and StudentRND (http://studentrnd.org) to help students at the CodeDay events learn how to code even if they don't have laptops!
Maybe sponsor one of the local events with a certain number so they can open up registration to kids who otherwise couldn't come due to the lack of a laptop.
I've heard rumors that this is the case (at least for the Acer C720), though I can't confirm it. I did call Acer to speak with a sales rep and learned that Acer's cost to produce is nearly $250 (if their information can be trusted), so it seems that someone is subsidizing the cost.