Based on a tip from James Snell, one of the first things I did on Gutsy was
apt-get install liferea
I then subscribed to my own feed, and clicked on my SVG in HTML Momemtum Building post. The SVG image on that post displayed correctly, and the comments were all fetched in the background.
I then subscribed to Jacques Distler, and clicked on the Gluino Masses post. I may not have all the right fonts installed yet, but other than issues like the vertical height of the integral and summation sizes, the MathML appeared to displayed correctly. The comments weren’t prefetched, but presumably would be if Jacques annotated his feed with Atom threading extensions.
Oh, and despite the name, the code is available for MacOS and Cygwin too.