Alloysoft has released its Signal software, which lets you control iTunes, Winamp, or Windows Media Player with an iPhone or Windows Mobile device via Wi-Fi. The software offers an iPhone-specific interface, which provides a two-way, live-updating view of your media player. Features include the ability to play, pause, and stop your music, browse and search your media library, adjust the volume, rate songs, and more. Signal is available for Mac or PC and sells for $30.
Signal allows iPhone to control iTunes