We'll forgive the extremely nice folk behind the PDJ when they claim to have the first fully self-contained portable DJ set-up. But that's not to say that there is nothing new here -- in fact there's plenty. The PDJ is a rectangular slab of refreshing creative optimism. On each end is a touchscreen display that shows a virtual turntable, and in the middle is a small mixing and FX section. So, already the PDJ will be familiar in set-up to any DJ who picks it up (something the Pacemaker couldn't claim with its proprietary interface). The mixer section has rotaries for