MacOSXHints had a useful hint for making feeds containing today's image from a ucomics.com comic, but it incidentally exposed how dodgy RSS' handling of entity encodings is.
So, I made a better version in Perl, that produces an Atom feed instead.
-->Download<--
'chmod a+x' the file, then run it in NetNewsWire 2 with 'File>New Special Subscription>Script', using arguments as described on the original hint page (eg Cornered|cornered|co)