Kevin Gibbons posted a thread at Search Engine Roundtable Forums last week about how he discovered that his blog has removed "removed from the Google index." After quick review, he noticed that he had some how added the <meta name="ROBOTS" content="NOINDEX,NOFOLLOW" /> META tag to all his blog pages.
So he dug deeper to figure out how it was added.
By default the <$BlogMetaData$> tag which seems to be the default on some templates within Blogger, automatically added that meta tag.
It basically tells search engines not to index the pages and crawl the content.
So he removed the tag and hand coded his meta data.
He is not the only one who had this problem, several commented at his post.
Forum discussion at Search Engine Roundtable Forums.