Waves Audio, makers of very expensive plugins, has entered the iOS market with a very expensive app. This DJ app comes in at $40, with a $5 In-App Purchase to unlock "MAXX" features. Folks familiar with Waves might not be phased by this, and may even count this as a bargain, but looking at the feature-set I'm not seeing the value here. The lack of Hot Queues and the limited effects make my eyes go weird looking at this price tag. They do make some amazing software though, that is truly sought after by professionals, so perhaps there is something going on here that isn't obvious to me.
I do like their use of iPods/iPhones for Cueing though! That looks really clever, and I like that the app is Universal so you don't have to buy the iPhone version separately. Their filter resonance sounds really nice too.