I would be curious how this directly and indirectly effects productivity. During some business classes in college (way before web 2.0 stuff) they often mentioned stuff about making employees happier at the work place and how you can (sometimes) get better productivity and reliability out them. Would a "Company" web.20 social site help create a better company (internally and possibly image - think of how well starbucks treat employees and how it shows) or help to slow productivity as everyone blogs all day and post videos of their kids? Also, does the size of the company make a difference. If it is a small web company like all Sarongs or a giant like ,a href="http://www.att.com">AT&T (which is a leader in communication and you might think they already have this too) does it make a difference. It would be an interesting project to do for a master thesis.