David Weinberger really has a way with describing web phenomenon. Here he talks about the context of tagging (think delicious) and what we are doing collectively with it:

So, we’re creating this context-free realm of free-floating metadata, like word magnets on a refrigerator door, that we will paw through and assemble, and, most important, do things we haven’t yet thought of.

The web still delights me even after working with it full-time for the past 6 or 7 years.