According to engadget, Apple has filed for a patent that would allow you to purchase music directly on the iPhone
Heres the article:
http://www.engadget.com/2007/02/01/apple-patents-itms-transaction-service-for-iphone/
Heres the article:
http://www.engadget.com/2007/02/01/apple-patents-itms-transaction-service-for-iphone/