Avega Oyster WiFi Speakers

Australian company Avega Systems are developing WiFi speakers that connect to your wireless home network. The speakers, called "Oysters", play digital audio streamed directly from your computer. Listeners can control, browse and select media from their PC through the Oyster's graphical remote control. The speakers will also accept input from a CD/DVD source and wirelessly distribute the audio to the other speakers in the room. The Oysters also will accept iPods or other MP3 players, via USB port, which will, again, trigger the connected speaker to distribute the audio via WiFi.

The speakers feature wireless connectivity (801.11 a/b/g), support for DTS, 5.1 surround as well as MP3, OGG, WMA, AAC and FLAC digital audio formats.

The unit also has 2 S/PDIF optical connectors and USB port for wired connections.

CNET feature on the Oysters with video.
Company FAQ and spec sheet (Both PDFs)