Ableton & Live backing tracks question

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Ok - so I just picked up ableton, looks very cool ... just getting started.

Question is: do any of you guys use ableton for backing tracks live ie; live band and laptop?
If so, any tips? can I create entire set lists of songs/wavs at different tempos? and is it stable running multiple wavs.

Thanx

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I'm using 7 BTW

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anyone? I can not believe there isn't anyone here who uses Ableton for this?

I guess it's the same principal as a Dj mix/set! can i use tracks at different tempos in the same set?