Are you a Firefox or Chrome user ?
Do you use gmail ?
Are you on facebook or twitter or Linkedin ?
If u have not installed the rapportive plugin in your chrome or in your Firefox, you are missing so much.
Its a plugin which replaces the Gmail Ads and provides the social info of the mail sender by matching the Email id. Its actually pretty helpful if you are a part of groups and receive mails as part of groups,to know who exactly is replying and posting.
Also, you can find your friends social networks accounts and add them to your pals list.
The link is http://rapportive.com/
Website of the Day - 30/11/10.