+1 for MIDI upgrade (as described by others above).
I'd like to see a few things in an update (hopefully soon): 1) option to have last patch used/edited upon opening, not just default, random, and current. 2) modulation (destination) of gain and level in the distortion effect. 3) modulation (destination) of velocity slider and length slider in arp section. 4) copy/paste, DropBox, and AudioShare support for patches, user waves, and user arp MIDI files, in and out. 5) modulation (destination) of delay speed and reverb room size. That's a lot to ask, I know, but even some of it would be much appreciated by most, I think.
Especially the input/output options.