Can't wait to figure out the recording interface. Apparently you plug in a hard drive (no computer necessary) and it records 18 tracks. Each of the 16 channels and then the two track master. If I read correctly, you can actually can use it to play back a previous performance and do a sound check without the musicians on stage.
Just updated the firmware... you can store entire mixes as scenes, so you can sound check individual bands and then flip between them once the show starts.