The issue has been emerging for years but it's now a hard trend : companies don't consider internal use of web 2.0 as a prospective subject and started to work on its implementation. The network logic and the question of knowing how to implement it is now on CEO"s agendas. All the same, people in charge often can't make head nor tail of it.
In the first years, the equation was as simple as web 2.0 = Blogs + wikis. No sooner companies understand what they could do with these...