RecentChanges for several wikis of interest in English only:
http://wiki.recentchangescamp.org/?action=rss returned no data, or LWP::UserAgent is not available.
http://wikifeatures.wiki.taoriver.net/moin.cgi?action=rss_rc returned no data, or LWP::UserAgent is not available.
http://cyberneticroadmap.org/?action=rss returned no data, or LWP::UserAgent is not available.
http://interwiki.sourceforge.net/cgi-bin/picawiki.pl?action=rss returned no data, or LWP::UserAgent is not available.
http://communitywiki.org/odd/WikiWoodstock?action=rss;rcidonly=RecentChanges returned no data, or LWP::UserAgent is not available.
http://www.usemod.com/cgi-bin/mb.pl?action=rss;days=7 returned no data, or LWP::UserAgent is not available.
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://www.communitywiki.org/cw?action=rss;lang=en;days=14;rsslimit=all 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.
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.
Define external redirect: FloodingRecentChanges