I find the inclusion of the IrDA port in 3DS pretty bizarre, but let's try to guess what might it be used for ? 1. Exchanging data between two 3DS's when WiFi is not available - possible, but multiplayer gaming would be extremely difficult as both consoles would need to stay still, e.g. lie on a desk in front of each other. Not exactly 'mobile' gaming 2. TV remote - nothing to die for 3. Communication with Pokewalker - not my cup of tea, Tamagotchis are for kids 4. Communication with Wii - now this might be interesting, like Wii's camera detecting the location of 3DS, or just exchanging information (downloading/uploading photos, movies, profiles, unlocking hidden levels). Too bad I don't own Wii Anything more you can think of ?