Have they announced if you will be able to use your GH3 guitars with RB2? I have two of them and was hoping they would. I know they can not be used with RB1 but hoping it will be for RB2.

Which system are you talking about?

According to these charts: http://www.joystiq.com/Instrument-Compatibility-Matrix/

the only system that the Les Paul doesn't work on is the Wii, but it also says it will work with RB 2. The PS3 RB/Les Paul compatibilityis still unknown as well, but since it worked for RB 1 I don't see why it wouldn't for RB 2. Should work fine for everything else.

I'm using my GH3 wireless Les Paul for the 360 version of Rock Band 2, so for that combination, yes.

Yup, I was playing with two wireless guitar hero controllers a couple weeks ago.

Rock Band 2 guitars work. Don't see why 3 wouldn't. Rock Band is cool like that. But try playing Guitar Hero with a Rock Band guitar. Ouch!

Guitar Hero 3 guitars work on ALL SYSTEMS. I use it on the 360, and HMX released a patch to make GH3 guitars work on PS3 (well for RB1, so RB2 they should work) And recently HMX released a statement saying that the GH3 Wii guitars will work on Rock Band 2.

They work, I tested it.