You can clone with
HTTPS or Subversion.
At http://slides.html5rocks.com/#notifications-api and http://www.html5rocks.com/en/tutorials/notifications/quick/#toc-twitter-example
Looks like it could be twitter API policy change, needs analysis.
@ernestd we made need to change these demos.
According to Mr Hanselman, they've changed the API to need an 'api.' and a version number: http://www.hanselman.com/blog/TheInternetIsNotABlackBoxLookInside.aspx
How's this coming @ernestd ?
We essentially have killed this article. It's deadzo.