If it was me, I'd get the Apogee Jam, totally.  The only disadvantage is that you can't use the POD Farm app, if that matters to you.

(Apparently it works, but not well: http://line6.com/support/message/333121#333121)

I bought a few model packs from AmpKit, and they're stunning, I wouldn't miss the POD Farm ones, no matter how great they are.  Though I am a modeling junkie

Well, my experience of the Mobile In isn't good.

Firstly, it feels cheap and chatty.

It is VERY flaky on my re-installed and clean ipad 2.0. It sometimes works, it sometimes doesn't. It is sometime recognised, sonetimes it isn't.

The actual app crashes every now and then when searching the online tones library and on occasions, returns to the default sound settings, but I'm sure this can be fixed in a future release.

All in all, not stable.

The "quality" cable is crap. Bell wire would make less noise.

Tapping the digital interface, without any cable connected produces audible noise, which tells me cheap components, poor mounting and poor shielding.

I can't compare it to the JAM as I haven't tried one (yet), but if I don't get my main problems sorted, namely the stability,  I'll be asking for a refund and buying the JAM.

M.