It appears that the concept of "work 2.0" or "the new way of working" (NWOW) is still quite popular as the subject is actively being discussed in many blogs, books, fora, etc. Fact of the matter is that the title / label seems completely wrong for the topic, possibly due to the fact that many companies just don't get it.
It is hard to come up with a very strict definition of what the 2.0 concept really is, or entails for companies. I'll stick to mentioning some of its aspects here to get a sense of the spectrum.