Developing Applications that work with iPhone OS Accessories

Accessories can connect to iPod, iPhone, and iPad through the 30-pin dock connector, Bluetooth, or Wi-Fi. Learn about the options for using standard or custom protocols such as location and iPod remote control. Understand best practices for Bluetooth and hear the latest on designing applications that use the External Accessory framework to interact with wired and wireless accessories.

WWDC 2010 - iOS