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It is now on the "featured questions" list (the second tab), and the edit also seems to have moved it up in the list of active questions.
for me, you question is number 6 in "Active", "Recent Questions". I do not see anything called "Newest"...
OK now I found "Newest". I never use that. It seems these are ordered by when the question was asked, and later activity does not change that.
Felix: Your statement about active being the rightmost button confused me for a moment. You must be viewing via the "questions" link (http://mathoverflow.net/questions) rather than the main page (http://mathoverflow.net/) which has active as the leftmost tab, featured next, and all tabs are further left than on the questions page.
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