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Double checked, looks like I wasn't serving the cache.manifest file correctly. Should be fixed now. Try again. Nice catch.
Hrmm....it kind of works. The issue I am having now, is that on the page I tried it only does part of the page. http://52weeksofux.com/tagged/week_1 I tried to capture that page, and it only captured the bottom story - not the top. I never checked the source or anything, so it could very well be something about that specific site. That was just the first site I tried, and that's what I found. Hope that helps :)
Ah, that is the result of the Readability, http://lab.arc90.com/experiments/readability/ algorithm, it is a bit greedy and chopped off some of the content.
If there are better algorithms/tools for scraping content please let me know.