Again, my greatest concern is that it doesn't mean all that much, while conflating far too much. Lane's post notwithstanding, Web 2.0 seems to be little more than a shortened way of saying something about the Web as it is used today. In other words, Web 2.0 is the Web: why proliferate terms in an area where we already have a surfeit?
I would agree with this. Web 2.0 simply represents an evolutionary step in the use of the Web, one in which (a) the Web becomes a platform for applications that once resided solely on local PCs or LANs (Google Apps, etc.), and (b) the Web becomes a file and message store and display platform for anyone who wants to participate (Facebook et al). These are significant changes from the Web of the late 90s, but the capabilities were largely there from the beginning. In fact, in some important respects Web 2.0 is a return to Tim Berners-Lee's original conception, when he saw Web pages as things to be edited and added to by anyone who visited them. Neil Randall