iFixit has taken apart a new iPod Touch and discovered a new chip, the Broadman BCM4325.
This chip is used for Wi-Fi (802.11 a/b/g) and it also supports Bluetooth 2.1. Unfortunately Apple appears to have decided not to offer the option of using wireless headphones.
It is probable that Apple uses this chip to support Nike+iPod function that operates on the same frequency 2.4 GHz.
[translation by crispin]
