One certainty about Web 2.0 is that if you ask six Web 2.0 experts "What is Web 2.0?" you will get a minimum of nine different answers!

Sure it is social relationships and networking (del.icio.us and linkedin), virtual communities (Second Life) , content-driven (blogs and dynamic CMS websites), a new way of doing things (the open source movement), available to everyone (not just the wealthy) and it is available worldwide (Internet cafes and broadband access).  

Fifteen or twenty years from now some aspiring politician will probably claim credit for Web 2.0.  Clearly Tim O'Reilly coined the term and brought it into the popular jargon back in 2004.  Unfortunately Tim was born in County Cork and is not eligible to be president of the USofA. 

While no one can precisely define Web 2.0, I do strongly believe everyone can agree that it is new and it is exciting and it is fun.