As you may have heard, Google settled with the Federal Trade Commission regarding its rollout of Google Buzz and its alleged privacy violations during that rollout. There are a few SAAS privacy or software privacy tips here, so I have tried to outline/simplify them for you.
As you can see this is not that hard, but at least learn the basics of what is going on in the privacy regulatory world, as a simple change of default settings (opt in or out) can cause the Federal Trade Commission to take action against you (not a good thing).
Disclaimer: This post is for informational and educational purposes only, and is not legal advice. Hire an attorney if you need legal advice.