First Look at Guitar Hero World Tour Touch-Guitar | Game | Life from Wired.com
Also, as mentioned earlier, they did turn up the difficulty on expert in RB2. GH should find it adequate.
I sold my Rock Band 1 gear and bought the new RB2 drums. It's wireless which was my first priority. The pads are a bit bigger and they are velocity sensative (like the new Guitar Hero drums; harder you hit them, louder they sound). Seems to work great. I'll probably buy the cymbal add-on, too. I'm going to wait and see the reviews on the GH drums before making up mind which set to stick with.