Google has added new dimension to blog search: “Search your blog world”. The
new blogger search, which is in the draft stage, uses Google Ajax Search
powered by Linked Custom Search Engine. It searches your own blogs
content as well as anything you have linked to in your blog posts, including
link lists and blogrolls. The search results follows the CSS rules of the blog
itself.
This search widget can be configured in your blog’s Template | Page Elements
tab, in the “Add a Page Element” popup.