I decided to remove Atom support in favour of RSS, mostly because I'm now generating the feeds (and html, etc) by hand and want to be a little lazy.
One side-effect of my laziness is the pages are now not valid HTML5, though I don't really care any more since Firefox and Lynx both render this site properly.
The "supporting" code for this website is now down to a couple of lines of shell and Make:
; wc -l bin/new.sh 16 bin/new.sh ; wc -l Makefile 9 Makefile