Bloglines announced that is now indexing over 1 billion articles. Think of articles as feed entries or blog posts. Bloglines says it adds 3 to 4 million new articles each day. They also said they don't keep articles from feeds with no subscribers.
We're proud to say that Bloglines has experienced tremendous growth, more than tripling subscribers, feeds and articles in less than a year. On January 5th we topped 1 billion articles and we're currently pulling in new articles at a rate of 3-4 million per day. For those number naysayers out there, keep in mind that we only keep articles from feeds that users have subscribed to (which also keeps our splog count lean). For these reasons, we consider ours to be the highest quality blogosphere index that exists.