Probably that they're still trying to make it under $35 and get it out the door. Keep in mind that this is technically their first model, they probably wanted

Probably that they're still trying to make it under $35 and get it out the door. Keep in mind that this is technically their first model, they probably wanted to keep things simple for a first release. You can easily add wifi using this $10 dongle: http://www.amazon.com/gp/product/B005CLMJLU http://www.amazon.com/gp/product/B005CLMJLU (according to the rpi forums, it works out of the box with current kernels)