The whole point is to learn to touch-type. What I did was find a touch-type webpage, and switch my keyboard to Dvorak while running the tutorials and tests. It wasn't designed for Dvorak, but once I got to the common words, sentences, whatever, it didn't matter that much.
I created a printed cheat sheet that I placed on my keyboard above the "F" keys.
I've been using Dvorak for over 10 years, and in either Windows or Mac it's really easy to set up and switch back and forth.
One thing I would recommend is to practice for a bit, and then switch completely. The first couple of weeks were pretty rough because I had programming assignments, but after that, it got much easier. At one point I was as fast with either keyboard, but my Dvorak speed is leaps and bounds above QWERTY.