If you already have MIDI set up between your Mac and iMS-20 on your iPad, you can use an application I made to randomize the parameters to discover strange new sounds you might not ever discover on your own. Check it out here:
http://www.sc-fa.com/blog/2011/05/22/sc ... rg-ims-20/
Take it or leave it. It does what it does.

Enjoy your new randomized sounds.