It may cost $10, but Numark's reputation allows them to get away with it. Mix up to four songs for your iPad, with the app beat-matching for you. Then, create playlists of all your mixes, and dance. [iTunes via Recombu]
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Kat, you really need to do a review of the Traktor S4!! It's not
the first of it's kind but it is by far the best and most awesomest
piece of DJ gear to hit since technics!