A good article on the correlation of running injuries and the super-dooper high tech shoes on the market.

Athletic Footwear and Running Injuries

Everything you and I always believed about running shoes and running injuries may be wrong! Here's the scoop: The modern running shoe itself may be the major cause of running injuries! Stated another way, the modern running shoe, presently thought of a protective device, should be reclassified as a "health hazard".

It's a couple of years old, but still some useful and valid information here.