A rare article was posted at the 
ESPN webzine about ultra-running.  Alas, it follows the now-all-too-predictable-pattern of asking if ultra-athletes like Scott Jurek or Dean Karnazes are "ultra-tough" or just "ultra-crazy?"  I guess there is solace in the fact that's what desk-jockey sports writers used to say about X-Games competitors too.  Now, snowboard high-jenks and motocross shenanigans practically pay the cable networks bills.