Rogue Amoeba has released an update to Airfoil Speakers Touch adding support for background audio on multitasking capable iOS 4 devices. Airfoil Speakers Touch allows users to stream audio to their iOS device from a Mac or PC on the same Wi-Fi network, effectively allowing the iPhone or iPod touch to act as a set of remote headphones. With the latest update users of the iPhone 4, iPhone 3GS and third-generation iPod touch can now keep Airfoil Speakers Touch playing audio in the background while using other applications. The update also includes updated graphics for the iPhone 4 Retina Display and several other minor improvements. Airfoil Speakers Touch 1.1 is available from the App Store as a free download. Streaming audio from a PC or Mac requires Airfoil for Mac or Airfoil for Windows to be installed on the host computer.