Is there actually any technical reason preventing iPod from being supported in SSL / SDJ?

Taktor has had it for like forever [it shows up as iTunes playlist(s)], 60BG (the largest iPod available, to my knowledge) is in most (if not all) cases large enough for most gigs to be used as an external HD, AND - you can (pre)(re)listen to your music as you drive/fly to your gig.