Rapportive - Useful

Recently I installed http://rapportive.com/ which is an add-on for Firefox and Chrome, which uses the Google ads space in your gmail, to show information about the sender of the current mail you are reading.
Basically your gmail will look like this:

It works very well and the important message about this kind of tool is the relevance and the ubiquity of contact lists nowadays. I currently use a Firefox add-on XMPP Client, which makes almost everything that I usually for Social Network and Work related stuff, to be inside my browser.

Dear Google, why don't you use the same space for 'Buzz' Timeline?