Know what I think would be good? To have the odd live mix with a mic recording of the crowd reaction to the overall dancefloor vibe included in the mixdown - to see when the crowd go nuts on a particular tune or mix or a live PA. I know that sometimes one just wants to hear the audio output of what the dj is doing, but if it's a live mix from a club night and not just a studio/bedroom mix then I think this would be interesting. Obviously it would maybe take a bit of tweaking to drown out any unwanted random yelling which takes away from the music, but it would definitely create a truly unique "live" picture of what it was like on the night, as opposed to just hearing the dj's mix. I've heard this sort of thing the odd time, like the Richie Hawtin Glasgow Arches mix which John Peel broad casted once, but other than that I've found it to be quite rare.