Anyone know if there has been any announcement about this?  I would love to simply purchase a midi pickup like one of those Roland GK's and use the RB3 midi interface to play with my real guitar on the 360.  Buying a crappy Squire right now seems like a no go.  I know you can plug a real keyboard into the RB3 midi interface -- psyched about that!

EDIT (I was horribly wrong): 
 
They are selling a MIDI converter box, but you can't use any standard MIDI guitar. Which is weak sauce.

" Yes, they are selling a MIDI converter box for like $30 that from what I understand will work for guitars too. "

" @JJWeatherman said:

" Yes, they are selling a MIDI converter box for like $30 that from what I understand will work for guitars too. "

If that's true that would be awesome and would save me a lot of money. But I don't think it's possible because the RB3 Squire guitar has all sorts of techy stuff inside "

Here's the Mustang: 

"

"Also, at PAX, they said that the Squier Strats won't be available at launch :( "

Yeah, because it needs it to be able to know where your fingers are located due to it being a modified real-ass guitar. I'm 99% sure MIDI guitars will work. As I mentioned earlier, the Mustang is a MIDI guitar, so why would any other MIDI guitar not work? 

Yes. I too was sad at this news. But, with the keyboard bundle being available at launch, I can wait happily :).  Any word on pricing for the Squier? "

 Thanks for all of the interest in the new hardware. We’ve been working closely with Mad Catz through this cycle and I wanted to drop in and clear up some rumors and misinformation. Understandably, this year’s blurring of gameplay and reality has created some great questions from the community and I wanted to come in and set the record straight:

Old News and Rumors Confirmed:

- The MIDIPro adapter will be required to connect the Squier to your console of choice
- The MIDIPro’s guitar setting is not compatible with traditional MIDI guitar equipment.

Rationale: The MIDIPro and the Squier use additional non-proprietary (SysEx) commands to communicate required fret positioning to RB3. In addition to allowing HOPOs, we needed to keep processing time down to a minimum in order to keep the game playable. (Have you seen the Rainbow in the Dark chart?) When good rhythm gameplay comes down to milliseconds, traditional MIDI devices were simply not fast enough and this required a custom “ground-up” solution.

New To You News (because I noticed davidshek wondering about this in some other thread)

- The MIDIPro is prepped to intelligently translate for a number of different e-drums models.

This includes “several” of the popular entry-level drumkits that are non-customizable. Any high-end brains with programmable MIDI should be able to be user-configured to the MIDIPro’s data requirements, which will available at product launch. 

Again, pretty sure this is mentioned every time they promote the Pro guitar.
 
They're doing a good job at making this thing sound very expensive, tho :/

I thought that you couldn't do it because the Squire they are making reads where your fingers are. The squire works as both, but I don't think that a Real guitar can tell the game if you are using the right fingering, it would have to check tuning and sound. 
 
The MIDI box was assumed to be for keyboards, and maybe electronic drum kits would work, but I thought they had confirmed that you can't use just any old guitar with the MIDI box to play.

Oh wow, no wonder they're being so mum about the pro guitar.
 
We'd need the guitar + adapter to play it, unless it comes in a bundle.  I'm guessing a $300-400 price tag would probably cause a huge ragestorm months before the product is available.