Wow, that's really interesting. It would be pretty cool if you could put your own tabs in it. It reminds me of the Guitar Pro program, which I love because I can slow it down and play along while I'm learning a song.
People diss Guitar Hero a lot, especially guitarists, but in my opinion, ANYTHING that could possibly get people interested in music is a good thing, especially because of the declining number of arts programs in public schools. I know at least 3 people who loved playing GH and Rock Band, and when they got bored with that, they went out and bought real guitars and started learning. One of my best friends plays the drums on Rock Band on the highest difficulty, and she recently got a real drum set and is actually pretty decent now. She obviously has years of practice ahead of her, but the game kind of affirmed in her mind that drums were something that she should pursue. I think that is much better than those games where you steal cars and shoot people.