I just got the DVD set from the Modern Drummer festival. It contains three of the songs that Stewart & Gizmo played - about 15 minutes of their set (sadly not their awesome version of Darkness which I'd still kill for SOME recording of).
The second disc contains a 22-minute interview with Stewart backstage; there's not a lot of new info for those us here, though he does talk a little bit about technique, stick grip, etc.
I'll get some screencaps up for my site eventually, but it might be a couple weeks before I get around to it.
The ordering link for the dvd set is already up in the Links section.