A description of how mashups and sampling are a useful way to talk about what web 2.0 means. I like it. I think it's a really smart metaphor. the only danger is annoying people who don't know what mashups are. But, I love the metaphor.
This is a really hard thing to tag. Basically, it's a grid that shows what little applications exist that combine other commong applications. So, for instance, what exists to combine Flickr with Delicious. or with Google Earth. Or amazon.