We now know what MixMeister Technology, a company that creates software tools for playing, producing and performing music mixes, plans to do with Apple's new iPhone SDK. It plans to develop an application to turn any iPhone or iPod touch user into a DJ. Called MixMiester Scratch, the software will let you perform a scratch at any time—even right on top of a song currently playing on your iPod touch or iPhone. Simply pick the sound you like from MixMiester Scratch's preset vinyl scratch sounds and start scratching. It'll also allows you to adjust the volume of the music in real-time using the iPhone's touch interface. MixMiester Scratch will be a free download when it becomes available sometime during the second quarter. You can fill out a form here to be notified when it's ready. MixMiester Scratch will be compatible with all iPhone firmware versions.