Did they ever make gh (5) controller use bluetooth on ps3?  I remember there was a minor to-do about it when gh3 came out, and I'm trying to weigh ps3 vs 360 version now as I want to buy gh5 and and looking for a reason to lean either direction...

If its like the Rock Band guitars then its wireless but not bluetooth so you need a dongle that uses a usb port. Don't know for sure though,

Yeah. Both the PS2 and PS3 controllers require a dongle in the USB port to connect the controllers to the system. The Wii and Xbox 360 versions don't need a dongle. If you're picking between the 360 and the PS3, pick the 360, for three reasons. 

1. The 360 version doesn't require a dongle.
2. The 360 version can have your avatars as rockers.
3. The 360 also has GH2 available to them.
   

They were lazy and didn't want to make two sets of controllers and bluetooth was probably more expensive. 
 
I'd get the ps3 version just to spite munchlax.

I've got the Wii version. I'd just assume that the 360 version is better due to those three things.