Having honed your newly-found DJ skills on your iPad using Djay, are you ready to take the next step and transfer from the virtual to real life controls? Numark iDJ Live ($100) was made for you. Developed in partnership with Algoriddim, the company behind the aforementioned Djay, the iDJ Live connects to your iPad — or iPhone, or iPod touch — via the Dock Connector, and gives you a pair of real performance platters for cueing and scratching, a central mixing section with a crossfader and plenty of buttons and knobs, and a custom audio cable for connecting to speakers and headphones. True, it's not technically a "real" DJ setup, but it's a big step in that direction.
Forget about the fact that you're going to have to carry around a big ol' lens. The iPhone SLR Mount ($190-$249) is here to give your iPhone access to Nikon or Canon lenses for supposedly awesome quality photos. The set includes an aluminum case, a fairly thick lens adapter, and a UV filter, all of which team up to let you attach your favorite zoom, macro, fisheye, or wide angle glass to your always connected shooter, making for nearly endless instant-upload photographic possibilities.