Max from Capsulated Software has just confirmed that the new version (1.6) of Cue.Play.DJ will be available in the app store on Monday. A lot of new features are confirmed for this release including 'scratch' capability, in-app recording (on some devices) and some enhanced looping features among many others. During the process, the developers re-wrote the audio processing section of the app to provide a more realistic sound and more responsive action of the waveform.
As far as I know, this will be the first waveform based app that will provide scratch capability (as opposed to audio scrubbing when cueing).
Cue.Play.DJ is currently priced at $9.99