Check out the article “Understanding Mobile 2.0“. Really interesting reading with very good points made. I am not sure the trend to tag technologies like this make really sense. Does the “2.0″ means that users participate to create the content? If so very cool, but I do not agree that the big guys are using the 2.0 in that way. To me seams more a marketing move, everyone is using it in presentations and talks.
I personally think that users should not only generate content but also participate to the creation of those applications that access their content. It should go both ways. Could Flash Lite be considered a Mobile 2.0 technology?