We have shut down API v1 and v2 as promised.
Just a reminder, you should follow @GitHubAPI on Twitter for the latest updates about the API. API v3 keeps a changelog of breaking changes, with plans for the next revision of v3.
Let us know through firstname.lastname@example.org or our
Contact form if you have any feedback. Last time, we received a lot of concerned questions regarding search support, and documented its API v3 port.