Acoustic Research Digital MediaBridge DMP3000

Streams video, audio, and images from networked PCs; outputs high-definition video and still images; integrated 802.11g wireless networking; supports CD cover art; generally solid user interface; includes universal remote control.

Doesn't play copy-protected audio files; lacks Rhapsody support; doesn't support Internet radio; no UPnP compatibility; lacks front-panel controls and display; Windows XP and 2000 only.

If you're more interested in streaming video than audio, the HD-friendly Acoustic MediaBridge should be at the top of your list.