Social-networking impacts search: "Google, as ever, was at the forefront of this online revolution when it introduced Orkut in January 2004 on an invitation-only basis. Since then it has seen its growth pale alongside other brands, possibly because it doesn't include blogging or video and requires users to use Google Accounts to sign in."
Blogger should be the main non-search product at Google with everything else from video to social networking built into and around it. Some of us have known this for a long time.