Roller hacks: Wellformed rss comments feed for JRoller
You don't have to wait for Roller to add a comments newsfeed, you can do it yourself through the Roller UI just by hacking templates, as illustrated by Richard Osbaldeston who has put together a page template that shows comment. I think Lance and Euxx have shown how to do this before, but Richard's comments feed is an extended RSS 2.0 feed and it also includes trackback:ping, wfw:comment, and slash:comments elements from the corresponding modules. Most excellent.
Richard also wonders aloud about contributing his work to Roller, or at least to the Roller Wiki. Unfortunately, I had to shut down public access to the Roller Wiki due to Wiki vandals/spammers. However, if you have something to contribute please let me know and I'll set you up with a login.