Hi,
There is a lot of stuff on the internet but sometimes it is dificult to get.
Im' making a list of all uC projects.
if you want your's on the list let me know.
What people say and what they mean can often differ quite a lot.
I like to think of DIY and hobbyist as not identical but at least in the same ball park. Your example of a 8051 to drive a little TV monitor is something that a lot of people can duplicate, and a lot more can understand and take an interest in.
Not too many commercial-grade projects are documented on the web. It either takes a lot of time, or the developers hopes to be able to make a bit of money from the project. And some ends up in scientific publications, well hidden among too much theory to interest most readers, or suffering from publication restrictions.
Anyway, until the OP posts again, we will not know if the intention is to link everything that is in some way related to microcontrollers, or if there is some master plan about what type of information to document and link.