I subscribe to the debian policy mailing list which often has some really interesting posts. This is one that I thought people would like to see, it needs wider distribution. The reason is that it is a pretty clear set of graphs showing how a package gets installed on debian and the consequences of installer scripts.
Go directly to the post by Manoj to read more about this. He is going to continue work on the graphs but in the state they are in now they are pretty useful to describe what happens.