It's got a port in the back where you can load a USB thumb drive, and import sounds you want to use as loops/samples. For example, if my band was playing "With or Without You", I could load in the synth loop that backs U2 up when they do it (provided I could find an mp3 of it)
Or, if we wanted to do Aerosmith's "Dude Looks Like a Lady", I could rip and import the audio of Steven Tyler's filtered "chye-yuh, chye-yuh", and hit the button on the pedal whenever I wanted it to make the sound. I have up to 99 presets

Getting excited about hopefully getting one soon!