@desocietas: I LOVE that game. Although I liked the navigation in 2 better (you can skip the beginnings of songs where you don't play, like in Elite Beat Agents), the track listing on this one is great.
If you're planning on unlocking all the difficulty levels and everything, I hope you like Ready Steady Go...I love that song, but I bet I heard it 200 times by the time I actually got through it on the final difficulty level. That's what's kept me from finishing 2...I don't like the ending song as well and it's hard to punch through it time and time again.