Here's an idea for the wish list. The HDR has empty card slots available. I'd like to see an option to add digital I/O to be used simultaneously with the AIO*8 Cards. This would relieve one impediment vs the TASCAM (which I am just starting to understand the need for). I guess over the long haul, I'll go with external converters, but this could be an excellent stopgap, alowing analog thru the shortest possible signal path in while still mixing digital.