Previewed at WWDC, launching in the fall.
Apple Releases iTunes 7.7 [Updated]
Use iTunes 7.7 to sync music, video, and more with iPhone 3G, and download applications from the iTunes Store exclusively designed for iPhone and iPod touch with software version 2.0 or later. Also use the new Remote application for iPhone or iPod touch to control iTunes playback from anywhere in your home a free download from the App Store.It is available in your Mac OS X Software Update at this time. Apple is expected to also released the 2.0 Firmware and App Store shortly, as well as launching MobileMe.
The update description confirms the iPhone/iPod touch remote application that will be available as a free download from the App Store. At present, the App Store is not yet functional.
Update: Nike + iPod setting (screenshot) for iPhone in preference files, indicating iPhone integration for running.
Update 2: Now available for Windows.