Tad Chef gives us 10 ways to use Google Buzz for SEO and SMO. He covers everything from indexing to keyword research to link building to personal branding.
For example, while most people compare Buzz to Twitter and Facebook, it's in reality a rival to Tumblr and Posterous, Chef writes. It's good for content you want to "drop quick and dirty without much fuss" into a social network. He calls Tumblr and Posterous better for doing this -- but Google is bigger.