How can an iPhone access another non-iPhone device over wireless or Bluetooth?

The only way to communicate with other Bluetooth devices via the External Accessory framework in iPhone OS 3.0 is if they are in the Made for iPod accessory program. Even though they communicate through standard Bluetooth connections, accessories need special hardware in order to process the data stream coming from the iPhone / iPod touch. Unfortunately, this means that your idea of communicating with generic Bluetooth devices won’t work on iPhone OS 3.0.

If the devices you want to talk to are Bonjour-discoverable via Wi-Fi, they don’t need to be part of the Made for iPod program. However, that doesn’t sound like your case.

Third-party developers in the near future may produce dongles that connect through the 30-pin dock port and give access to existing Bluetooth devices. If these developers opened up their communication protocol, that might enable your goal of communicating with these devices.

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