FitNesse.
RssFeed [add child]
The RSS URL is simply http://[myWikiAddress]/[somePage]?responder=rss

This will send you a list of all the recent changes for [somePage] and all pages below. If you omit [somePage] then you'll get a list of all the recent changes in the whole wiki.

The RSS feed is version 2.0.

In order to make the links in your RSSReader clickable, remember to set the RSS_PREFIX variable.