wow... I too thought this was Github endorsed. I recall reading about the referenced blog post on HN some time ago. The comments suggested they contact Github. And then a link appeared to giving.github.com. I guess I just assumed it was something Github had green-lighted. I guess it is not. :/
Thought so too, for a moment - but on second thought, GH set the UX bar for their add-on projects quite a bit higher (as may be observed e.g. here http://hubot.github.com/).
