Nike+ without the Nike part?

I saw this interesting post on MIT's Gizmodo technology blog. The Gizmodo article states that:

"Apple wants to take Nike+ to a different new level to perform precise, real-time tracking of runners' performance and offer location-based information and advertising. Their latest patent not only details how they will get rid of the current RFID sensor and add a series of force sensors instead—as well as GPS support—but also how they are contemplating other "authorized" shoes. Does this mean they are abandoning their relationship with Nike?"

Interesting idea to put the entire sensing system into the shoe itself. With all that plus GPS I imagine it would be a very expensive pair of shoes. Given that most established runners replace their shoes after about 350 miles I'd hope that the electronics can be detached and moved to another shoe. The article also says that the GPS will be able to serve location based advertisments to the runner through an iPod so maybe consumers can get a break on the price if they agree to accept ads.