We all have to be very careful at what we now post on our social sites. Future employers are now able to view and verify your sites and determine just how viable a candidate you really are. This article from MSNBC tells how an employee weighed his options at working for a company, only to discover that his future employees were very tech savvy and were aware of his decision and even went so forth as to comment on his tweeter about it.
The world is small, and with all the social sites out there it's getting a lot smaller. Take the time to be extra cautious as what, and when you post items out there. You never know who is watching and taking notes on you.