Also, this is something they really needed to incorporate into the game, as the guitar hero franchise has lately been getting out of control, with all of these Guitar Hero : (Insert band here) and little inovation since the original title.  I thought they were going to kill the franchise, but this is brilliant.

I think the introduction of Rock Band in the market has created a new level of Guitar Hero beast... That music editor is amazing!

I think they must have been working on this well before RB was released. There are just too many improvements for only 8 months of work.

Wow, this is amazing and blows away rock band. Use any real drum set you want, music creator, GH Tunes, Instrument Creator and everything else completely kills Rock Band. Now we just need a set list.

There is a part 3 for the music editor demo, it has been added above.

New video of them actually playing the game:

This is amazing, I've already started saving up for the full bundle.

Activision, I hate you.

Here I was all set and content with RB2 and you had to go crazy with GH:WT. I'm too broke to buy both full bundles so if this custom music tool keeps impressing it looks like i'm going GH.

If only they let instruments work between games....

On the 360 RB drums and guitars work wit GHWT, but can't take advantage of the music editor and other things like velocity sensitive drumming.

I'm talking about PS3 though. I know there was the whole controversy with RB1/GH3 where Harmonix wanted to release a patch that let the Les Paul work with RB but Activision blocked it so I doubt they're going to start working together now.