constructive use of you email metadata to add value

Both of these services analyse your patterns and email behaviour to make suggestions…..leaving the only question as “when will Gmail write the email for me, sent it and respond so I can spend all day on the beach?”

*Got the wrong Bob*  is a new Labs feature aimed at sparing you this kind of embarrassment. Turn it on from the Labs tab under Gmail Settings, and based on the groups of people you email most often, Gmail will try to identify when you've accidentally included the wrong person — before it's too late. When's the last time you got an email from a stranger asking, "Are you sure you meant to send this to me?" and promptly realized that you didn't? Sometimes these little mistakes are actually quite painful. Hate mail about your boss to your boss? Personal info to some random guy named Bob instead of Bob the HR rep? Doh!
http://gmailblog.blogspot.com/2009/10/new-in-labs-got-wrong-bob.html

*Don’t forget Bob* ….Have you ever realized you mistakenly left someone important out of an email, or just spent too much time trying to decide who from your long list of contacts to include?

http://gmailblog.blogspot.com/2009/04/new-in-labs-suggest-more-recipients.html