Great stuff- I actually just bought an Akai HeadRush loop sampler myself.... watch out for saw, percussion and sax jams coming soon. Actually my saw is great for this (in that it combines cowbell, cymbal, rub-board and theramin- I've done a few non-real time layer pieces with it and can get a good tom waits/massive attack thing going).
Do you reckon the guy's got his tenor double tracked on this video?