...or run in clogs? ;o)

Does anyone have any tips for running on cobbles? I'm fortunate to run regularly in either London (around the Tower) or a lovely old conservation town - unfortunately, both have a lot of cobbles! And they hurt! They also seem to unbalance me and slow me down considerably.  Other than my usual approach of "Ow. Ouch. Ow" grumbling and stumbling all the way across them, has anyone else mastered the cobble and found a more comfortable way of running over them? All hints and tips gratefully received.

Happy Running, Wease