From 1up.com:
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With Guitar Hero III: Legends of Rock on Xbox 360 and Wii, you simply turn on the machine, sync the guitar and start to rock. On PlayStation 3, however, there's the bizarre addition of a USB wireless dongle, despite the hardware featuring wireless Bluetooth technology in the box -- it's how the Sixaxis connects without a cord. When no one would comment on the additional wireless accessory during a Guitar Hero press event a few weeks back, 1UP contacted Red Octane for an explanation on why the PS3 version needed the additional step.

"For the PS3 guitar, we're using our own 2.4ghz wireless solution. Our products require considerable time for certification and testing to perfect both our software & hardware, so this was the most effective way for us to bring a high quality wireless solution for PS3 this holiday," said Red Octane VP of Hardware Lee Guinchard.

Right, but why? The wireless capabilities of PS3 and Wii are both Bluetooth-based. The Wii version doesn't require a separate dongle -- it simply hooks into the Wiimote and hijacks the existing signal -- so why are developers swapping Sony's own wireless solutions for their own? Red Octane spokesperson Bryan Lam told 1UP it's because Sony's tools only work for the Sixaxis at the moment. In order for Guitar Hero 3 to hit day-and-date with the other versions, Red Octane was forced to develop their own wireless solution. Nintendo, on the other hand, had everything ready to roll, allowing Red Octane's guitar to simply ride on the existing Bluetooth technology found in the Wii.
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Full Story: 1up.com

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