Hi!
I blocked Apple's MacOSX RSS syndicator - it probably wastes petabytes of diskspace on unsuspecting user machines, as any open of Wikipedia's RSS feed in Safari will actually be automatically added to the syndication list and resynced constantly. Isn't that painful with other feeds, but Wikipedia's "recent changes" feeds is huge. Oh, and it also stressed our side :-)
Domas
wikitech-l@lists.wikimedia.org