Santa Barbara-based Sonos, the developer of the Sonos wireless, multi-room music systems, said Wednesday that it has released its Apple iPad application. The application--which users had been eagerly awaiting, particularly since a slip of its release date in August--is available for free on the iTunes App Store. The Sonos Controller for iPad allows owners of Sonos equipment to control that equipment using the iPad's touch screen. The Sonos iPod version of the software had already been available and running on the iPad, but did not take advantage of the iPad's larger screen and capabilities. Sonos said that, along with the new iPad software, it has updated its software for the Sonos Multi-Room Music System, adding features such as support for AAC radio stations, and extension of Spotify access in Finland, France, the Netherlands, Norway, Spain, Sweden and the UK.