Jim,

I use both, 4th gen ipod touch and 3rd gen ipod touch for all my mobile recording. I basically use JamUp for the guitars, nanostudio for drums and backing tracks, multitrack daw to put it all together and mix. I just bought sampletank, so we'll see how that comes into play! I don't use any midi controllers...just the touch screen...less equipment to drag around. Get back to me if you need any help!