Back in the day, DJ's needed to bring hundreds of CD's (or LP's, natch) along to a gig, because in the DJ game, one needs to be prepared. Nowadays, all a DJ needs is an iPhone and Numark's latest product, iDJ Live.
As seen in the video above, the rig hooks to your iPhone/iPad/iPod Touch via the 30-pin dock connector and interfaces with Algoriddim's djay app:
iDJ Live features two large performance platters and a central mixer section with a crossfader, buttons and knobs to recreate the two-decks-and-a-mixer setup that professional DJs prefer. iDJ Live comes complete with an iPad DJ stand, custom audio cable for connecting to a sound system and headphones, and 30-pin dock connector for iPad, iPhone, or iPod touch.
iDJ Live is $99.95, locate a dealer for more info.