Jamble: The Monster MASH!

Jamble Music Mashups [iTunes link] is a fun music iPhone app that lets you be a DJ and mix and mash snippets of popular songs. Being a musician and into this type of mixing, I had to get it. At $5.99 it's not the cheapest app, but it might be one of the more impressive iPhone apps in a while. Definitely impressed a few people at work. The app works exactly as this video shows (minus the smiley face on your finger):