Dezeen does some very good selective reporting from the footwear industry:
www.dezeen.com/tag/footwear/
The sleminars from SLEM footwear design school in the Netherlands are very future-forward and insightful!
http://www.slem.nl/sleminars
I am wondering if anyone knows any good recent literature on the design specifically of running shoes, about materials, mechanical performance, testing procedures, ergonomics, future concepts and wearing comfort.