Akai have released iMPC for iPad, with impressive features and knock-out price.
Akai iMPC features
More than 1,200 samples, 50 editable programs, and 80 editable sequences
Exclusive iMPC sound set and classic Akai Professional sound library
Sample from iPad mic, line-in, or music library using multi-touch turntable interface
Export tracks to MPC Software for use with MPC Renaissance and MPC Studio
In-app SoundCloud community, powered by CloudSeeder
Share on SoundCloud, Facebook, Twitter, Tumblr, or export to your computer
16 Levels mode: 16 levels of attack, velocity, length, and tuning
Note Variation slider: adjust attack, velocity, length, and tuning as you play
Trim and categorize samples, undo takes and erase samples
Create new sequences, record and overdub beats
Live Sequence queuing for real-time performance and playback
Simple drag and drop program creation
Built-in effects: delay, bit crusher, master compressor/limiter
Time correct: 1/8 note – 1/32T with variable swing
Note Repeat: 1/8 note – 1/32T timing, with latch
Supports WIST, wireless Sync Start protocol from Korg
AudioCopy beats and sequences to compatible apps
AudioPaste samples from compatible apps
Tabletop Ready iMPC is free for iMPC owners
Route to and use with your favourite Tabletop Effects and devices
Line-in allows you to resample Tabletop devices
Use with Tabletop’s Timeline Editor