This is for Stefan ;-)
AFAIK there is no QuickAdd Firefox extension doing RSS auto discovery for Rojo like there is for Bloglines but the bookmarklet does quite a good job there. I now tried it on this article by Jeffry Zeldman and it worked without a problem :-)
Do you want to give me feedback about this article in private? Please send it to comments@zerokspot.com.
Alternatively, this website also supports Webmentions. If you write a post on a blog that supports this technique, I should get notified about your link 🙂