Herewith, a simple demonstration of what aggressive canonicalization can produce. […] The cache is simply files in Atom 1.0 format, with all textual content normalized to XHTML.
More importantly for my purposes, Sam’s Venus branch of Planet also normalizes URLs, which means I can use it to generate a feed so Gregarius (based on MagpieRSS) will no longer mung up relative links in Atom feeds like his and Tim Bray’s. (Neither does my private SimplePie-based branch of Gregarius, but that’s another story.)
