For a philosophy site that's at the same time bizarre, funny, and genuinely informative, see garygeck.com. His "Secret History" video series appears to be baiting crackpots and cranks everywhere only to give them a good dose of ... the philosophy of mathematics (to begin with). To see what a (sometimes too loud) soundtrack and visuals can do for a subject that might otherwise bore you to tears, see the first video on Cantor, in which Geck defends the Leibnizian method in calculus (which makes use of the concept of the "infinitesimal" rather than today's more typical use of concept of limit). This makes it all worthwhile: "In other words, the sober-minded mathematical public had been forced to stare at actual infinity for over 100 years, and absolutely despised it" (9:17). The icing on the cake is the thoroughly amusing rap/Leibniz video (embedded above) that Geck sent me, in which we get to see "motherfuckin' Leibniz" dancing. I like.