I like this piece by Seth Godwin in which he comes up with a bunch of new words to describe “great stuff” and in the course of the article makes some darn good observations about how to get a product up and running.

For example; there's a very important moment when a product becomes “remarkable” and opinion leaders start buzzing about it amongst themselves. He calls products like this “Purple Cows.” With that, people can start asking questions like “how can we make this more Purple?” A great insight, among many.