Recently, an important post by Jim:
Lengthy, but I recommend reading the whole thing.
Also highly recommended, his Throne, Alter and Freehold article from last November. Separation of powers, the old fashioned way.
[edit] I went and clicked on the “Throne, Alter and Freehold” link and realized that I myself had only read part of that article. It’s long. But quite interesting. Need to find some time…