Web 2.0 Reactions

I kinda feel like a Grade A idiot right now because I'm not sure I exactly understand this whole Web 2.0 thing beyond the whole idea of interactivity between user and content. hunh...? euhh...? I guess I can relate this to the website my fiance is supposed to be building for wedding information, registry links, etc. (be on the lookout for davidandjulieforman.com!). That's kinda like a Web 2.0 because it's going to be interactive and the point is not only to share information, but to link up with people and build bridges and better the community and save the world from itself and make children happy....it's all for the children!! I believe in you...!