Dana McCourt at The Edge of the American West has a short series of posts on Leibniz and Spinoza, based partly on The Courtier and the Heretic by Matthew Stewart. This is great stuff, the kind of thing blogs do better than anything -- bite-sized interesting pieces that stand by themselves, just because. (And the cheap chronological hook that November 18 was the day in 1676 when the two met in the Hague.)