Being user of SunVox since it's Palm OS version, I can't even say how happy I'm with running it on Maemo. I was surprised by amount of new features. It seems that commercial iPhone port drives the development further.

After connecting portable USB keyboard with trackpoint (having right mouse click menus comfortably at hand) it becomes a really mobile mini audio workstation. Bless the devs of USB Host Mode! And .wav samples recorded by Recaller can be used in the sampler, yay! Now I just need to find the way how to record line input via mic part of audio connector.