Here is a list of philosophers and historians of philosophy whose passing during 2010 was noted on the blog:  Kurt Baier, Jacques Brunschwig, Richard Cartwright, Denis Dutton, Antony Flew, Philippa Foot, David Furley, Pierre Hadot, John Haugeland, Paul Hoffman, David Hull, Claude Lefort, Ralph McInerney, Ian Mueller, Brian O'Shaughnessy, Margaret Osler, Nelson Pike, Itamar Pitowsky, Anthony Quinton, James Ross, J. Howard Sobel, Edna Ullmann-Margalit, Mary Anne Warren.

You can see a list of prior years' deaths of philosophers here.