From Elgato Systems:
EyeConnect software enables your UPnP AV digital media device to stream EyeTV recordings, digital photos, music and movies from your Mac onto your TV or stereo.
EyeConnect is based on the globally trusted Universal Plug and Play Audio/Video standard (UPnP AV) for the seamless sharing of digital content throughout your home. Using this industry standard technology, EyeConnect enables a broad range of UPnP AV devices to play EyeTV recordings, digital music, video, or photo content, including iPhotos, iTunes, and movies stored on your Macintosh. Elgatos EyeConnect digital media streaming software addresses a rapidly growing market for home networking solutions for the Macintosh.
Use EyeConnect in combination with your UPnP AV digital media device to manage wired or wireless streaming of digital entertainment content effortlessly. Digital media files remain organized as originally stored in your Mac libraries so you can quickly find the file you want.