I am not sure how new this list is, but I enjoyed having a look at these “web fads” (although I am not sure I would call them that). Some of these I remember well but I think I there are a couple that I missed. For instance, I remember the Apple Switcher Campaign, but don’t remember the hoopla around Ellen Feiss.
And for a much bigger list of related fads, check out the Wikipedia list of web phenomena.
As a side note, it seems that life gets busier and busier all the time, but now I have found a perfect visual metaphor to describe my life at the moment. Now that’s talent!