I've been tinkering with Korg DS-10, the generally awesome music creation app for the Nintendo DS. It has some limitations, but it's a surprisingly powerful tool for its modest platform and the touch screen allows for direct input in the style of Korg's Kaoss Pad device.
The method I've been using with DS-10 is to construct loops and instrument/scale sets and then improvise with them. You can hear some of the more interesting results of this work here: DS-10 Exegesis
There will be more of this in the future.
