Over at Aeropause, they spotted this worrying paper submitted by Sony to the FCC. In the paper, Sony claims that Bluetooth and Wi-Fi modules in the PS3 do not transmit simultaneously. This is doubtlessly meant to assuage some sort of FCC requirement.

But if this is true, doesn't that mean that you couldn't be connected wirelessly to the internet and use wireless controllers at the same time? And isn't that just stupid?

Aeropause is cautioning that people not read too much into this, before explanations have been gathered. And hell, there's a few possible explanations, no doubt. I'd personally be surprised if this were true. But then I start thinking all the other ways Sony has managed to fuck up their sure thing, and I start getting a little bit nervous again. Florian Eckhardt

FCC PS3 Papers, What Does This Mean? [Aeropause]

Edit: Kotakuite Kigian writes in the comments:

It is true that both Bluetooth and Wifi use the same ISM band. However as anyone who has Wifi in their home and who uses Bluetooth too, they certainly do work together just fine. They don't need to be transmitting simultaneously.

And Kotakuite John Doe also wrote in:

Just saw your article on the FCC filing revealing that PS3's bluetooth and wifi do not transmit simultaneously. This simply indicates that they're using Time Domain Multiplexing to interleave Bluetooth and Wifi activity to avoid interference between the two signals (since both are on the 2.4Ghz band). To the user, they'll both appear to be on simultaneously, but technically underneath they're actually each active on alternating intervals (it alternates between the two very very quickly, so that to the user it appears they're both on at the same time, all the time). You can do this because the bandwidth required from Wifi and Bluetooth combined is less than that offered by the 2.4Ghz range.

You guys rule. Thanks for the clarification! So we can all probably stand down in alarm on this one' although if that's de facto the way WiFi and Bluetooth operate together, I'm not entirely clear on why it needed to be specified by Sony.