This is a screen capture of my google mail account. Note the right hand side add on of Rapportive. I love Rapportive (rapportive.com) for a number of reasons - ability to manage contacts with social networks, add comments to their name, etc. But my favorite is when reviewing twitter updates regarding new followers. I don't automatically follow everyone back (I will if they contact me directly or strike up a conversation - for me its all about the relationship or at least the effort to start one). With Rapportive I can quickly see a persons social sites which allows me to get a glimpse of who the person is and I can quickly make my decision to follow back or wait for the tweet. Same holds true for anyone who might email me though, all their (your) social sites come right on through.