My blog, http://www.in-the-attic.com is hosted on Github pages, I have tested against the site this post links to and my site is accessible. IP it resolves to is 204.232.175.78 and this is the Github pages IP address.
Combined with the recent upgrade of the GFW, we're stuck with SSH tunnels. There's a business opportunity here (and we're not far from throwing ourselves at it).