I don't recall the urls - I was recursively crawling from a user-provided seed url and had trouble with apricot, node-xml, and libxmljs. I had the least time to play w/ libxmljs because of hassle w/ joyent --- I had to compile v8 and node to link against and scons wasn't playing nice w/ the build environment.

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Edit: I should add that I'm using libxmljs in production (http://newsbasis.com/news) as an rss parser (streaming sax-push-parser) and it works quite well for that sort of xml.