he new interface is available for all Blogger in Draft users.
here is no sign up or activation process required; Blogger users are now greeted with a clean, spacious white and orange, the most essential tools built directly into the Blogger root when accessing Blogger in Draft. http://draft.blogger.com/home
New buttons and icons also add to the streamlined and simplified look that complements other design choices Google has made recently to unify its brands.
For example, the new post screen, where users write the content of their blog posts, offers much more text real estate than ever before.