Well it arrived yesterday so this is just a preliminary review but it seems like a pretty cool piece of equipment. It came with the unit and 2 MIDI cables. The cables are made by Planet Waves, but they're pretty thin so I'd refrain from throwing them in a bag with a whole bunch of other equipment.
All testing was done with an iPod Touch 3G (32GB), Roland Juno Di and Line 6 M9.
Apps:
MIDI Memo Recorder: Free
Line 6's App which allows you to record and play back MIDI tracks, backup your Line 6 gear and a bunch of other stuff listed on their website. I used it to back up my M9 which took about 30 seconds and 60kb of space. Pretty straight forward, though a look through the Advanced Guide is recommended.
50 in 1 Piano: $1.99
Works fine, plenty of nice usable sounds to play with. Some features of my Juno Di worked with it such as the Octave Up and Down buttons, Pitch Stick and Sustain Pedal.
NLog MIDI Synth: $8.99
Works fine, lots and lots of tweakable sounds and features which can be stored. Same hardware functionality as with the 50 in 1 app. I didn't get deep enough into it to see if I could use any of the Di's rotary knobs to adjust any of the parameters. I would hope so since the in app knobs are far too small to be useful in a live situation. The app's XY pad will have to suffice otherwise.
*Important Notes*
1. The MIDI Mobilizer is powered by the iPod/iPhone/iPad itself, and can't be charged while in use. I'm not sure what the battery usage on this thing is, but I'd recommend charging it beforehand if you plan on using it live.
2. Sound comes from the iPod/iPhone/iPad which means connecting to the headphone jack is your only option.
All in all a cool piece of kit with a bunch of features that go beyond what's in this short review.