yeah, there is a PC tablet that has firewire connectivity, though I'd like to constrain use via Iphone 4s or Ipad..
That said, and as per "dreidesq" connection w/ my DB is via FW 400 and receives power via tethered. I noticed this product that might offer the powering solution....
http://www.radtech.us/products/cablejive-dockstubz-30pin-firewire-adapter#appreciate the feedback....