Blogger have announced that the documentation for people who write tools using the Blogger APIs has moved to https://developers.google.com/blogger/
This iinformation is what you need to know to create and share you own gadgets. It is also very useful for blogger-helpers who want to understand the data / schemas that Blogger uses, in order to work out hacks for the rest of us to use to control the look and feel of our blogs.
The blogger developer forum is another very handy place too.
