I just finished Chapter 1 of Aaron Reed's Learning XNA 4.0. Everything's really easy so far. A couple of minor questions, but the guys on the Dream.In.Code forums are really helpful. Right now I can't think of a good way to display variable values on screen because I haven't learned how to output variable text yet, only sprites. Hopefully someone answers my question on the forum, or I find my answer in Chapter 2. I won't be moving on to Chapter 2 until I finish Chapter 1's challenge; make the animated sprite bounce off all four corners on the screen.