What Happened To Those Category Theory Posts I Promised?

I have been threatening to do a series on category theory, and you may imagine long hours of researching and emerging insights, followed by even more hours of making notes, drafting and re-drafting. Not to mention finding out that Blogger supports neither the asmcd nor tickz-cd LATEX environments, which are what I use to create diagrams. And talking about categories without having diagrams is like talking about art without a pictures to look at. So I'm going to write it up as a LATEX essay, and post it in the same place as my essay on the philosophy of mathematics. It will give me a longer-term project to work on. The methodological issues are wider than I thought, and quite interesting - for those sad souls into that kind of thing.