Express yourself with the Blogger Template Designer: Official Google Blog
http://googleblog.blogspot.com/2010/03/express-yourself-with-blogger-template.html
Blogger in Draft: The Blogger Template Designer
http://bloggerindraft.blogspot.com/2010/03/blogger-template-designer.html
iGoogle や Gmail からブログを利用する - Blogger ヘルプ
http://www.google.com/support/blogger/bin/answer.py?hl=jp&answer=143415