South Korean MusicShake is an online amateur music mixing service that was unveiled to the US at TechCrunch 40. I know Vince and Nicholas enjoy DJing and mixing their own music, but I don’t have the music background or know-how to cut beats or whatever it is they call it. MusicShake allows you to mix tracks and sound effects to use on your personal sites or as ringtones. If you’re not musically inclined than Nuba, a robot working behind the scenes can make recommendations for you. There’s also a way for you to sell the music you’ve made and split profits 50/50.