The XO laptop is real, is being made and certainly is not a scam. As for whether its a good laptop however, well that depends on what you want to use it for.

It has a interesting screen, it is build for education so dont expect to see much other than education software and perhaps web and email. However I did see an article awhile ago that did say you could put Windows on it, but its not really powerful enough to do it in a meaningful way.

Jen