Sono sempre stato convinto (e lo sono sempre di piu') che in realta' Web 2.0 non vuol dire niente.

Lo confermano molte fonti autorevoli.

La stessa wikipedia (http://en.wikipedia.org/wiki/Web_2), oltre che innumerevoli forum e ambienti di discussione, non riescono nemmeno a definire di cosa si tratti. Cito da Wiki:

"Given the lack of set standards as to what "Web 2.0" actually means, implies, or requires, the term can mean radically different things to different people.
Many of the ideas of Web 2.0 already featured on networked systems well before the term "Web 2.0" emerged."

"Conversely, when a web-site proclaims itself "Web 2.0" for the use of some trivial feature (such as blogs or gradient boxes) observers may generally consider it more an attempt at self-promotion than an actual endorsement of the ideas behind Web 2.0.
"Web 2.0" in such circumstances has sometimes sunk simply to the status of a marketing buzzword, like "synergy", that can mean whatever a salesperson wants it to mean. The argument also exists that "Web 2.0" does not represent a new version of World Wide Web at all, but merely continues to use "Web 1.0" technologies and concepts."

E gia' questi due brani la dicono lunga!