The folks from Information Architects Japan have come up with this map which outlines the 200 most successful websites/services grouped by popularity, purpose, proximity, success, and a couple of other factors. What is interesting about this map is that it does a pretty good to outline most of the security threats that cripple around Web2.0 technologies. How? Well you have to wait. I am working on it.

web trends map

The map is available in several sizes and formats. Check out the larger version for more detail or use them as a desktop background. I am planning to overlay the map with my own research. Soon. BTW, there is a clickable online version available here.