I remember seeing this on bits du jour sometime ago, but don't remember what it was called, or even how to describe it. It was a cool visual way to track how network information on your computer gets processed. For example, if you start a program, that exe will call a dll, which will access the internet through some protocol. So, the program will draw a visual picture and you can trace the line going from the program through the various files and protocols until it reaches the internet. It was cool, it lets you identify where the problems are happening and where the bottlenecks are and stuff.
If anyone can remember this, or software like it, please let me know.