Due to security issues and other fundamental problems with the android operating system, I've recently made the switch to an iphone 4s. I would like for it to replace my iPod video which also has some problems working with my car and the default is sucks for searching music (no keyboard). I really just want an application which will create a dynamic playlist when I search for a keyword or two based on the metadata I put in the id3 tags. Since I listen to a lot of different artists, I don't really have an album or a single genre that I can assign to the music. How can you put electronic house tango as a genre and expect it to be relevant to any other music in your library? But it fits all 3 and if I'm in a tango mood I expect to hear it if I search for "tango". So does such an app exist or am I just weird for not listening to standard iTunes music?