RecentChanges for several wikis of interest in English only:
http://wikifeatures.wiki.taoriver.net/moin.cgi?action=rss_rc returned no data, or LWP::UserAgent is not available.
http://wiki.recentchangescamp.org/?action=rss returned no data, or LWP::UserAgent is not available.
http://cyberneticroadmap.org/?action=rss returned no data, or LWP::UserAgent is not available.
No items found in http://interwiki.sourceforge.net/cgi-bin/picawiki.pl?action=rss.
No items found in http://communitywiki.org/odd/WikiWoodstock?action=rss;rcidonly=RecentChanges.
http://onebigsoup.wiki.taoriver.net/moin.cgi?action=rss_rc returned no data, or LWP::UserAgent is not available.
http://intcomm.wiki.taoriver.net/moin.cgi?action=rss_rc returned no data, or LWP::UserAgent is not available.
http://wikinodes.wiki.taoriver.net/moin.cgi?action=rss_rc returned no data, or LWP::UserAgent is not available.
2010-03-19
2010-03-18
2010-03-17
2010-03-16
2010-03-14
2010-03-10
2010-03-09
2010-03-08
I took out http://wiki.wikisym.org/exec/rss?type=recentlychanged because the diffs were FloodingRecentChanges?, but you may be interested in looking at that, too.