Editor's Note #5.

I thought I might add a new bit to this bloggy thing I'm doing (6 weeks old and I'm changing it already). 

So, see below for the first "Stuff from the Literature" comment. I'll try and find a paper or two and break it into manageable chunks. 

As always, this is firstly an effort by me to learn something new, and secondly to try and communicate that to others. It won't be definably regular.