The Buffalo LinkTheater PC-P3LWG/DVD Wi-Fi enabled DVD and Media Player is apparently one of the bestselling media streaming devices in Japan. It is also available in the USA.
The PC-P3LWG/DVD seems to have it all: Integrated Wi-fi (802.11g), HDTV resolution (720p and 1080i), DVD Player, WMV, DivX, MP3 and WMA format support, USB Port to connect Hard-drives or Card Readers. See the feature list below.
More details on the Buffalo product page.
The Buffalo LinkTheater PC-P3LWG/DVD starts at below $300. Find Stores here.
High speed 802.11g Wi-Fi streams all media content fast*
Supports regular TV and HDTV (720p and 1080i) formats
Supports external 2.4GHz antenna for increased range
Integrated PCast module allows for easy playback
Buffalo LinkStation Network Storage Center and Buffalo
TeraStation 1.0 TB Network Attached Storage (sold separately)
Versatile Media Support
Built-in Progressive Scan DVD player supports DVD/SVCD and data formats
Wireless access to online media content
WMV and WMV HD playback
DivX® and DivX® HD playback (Official DivX® Certified product)
MP3 and WMA audio
Ease of Use
Remote control for easy access to all media content
AOSS™ (AirStation One-Touch Secure System™) provides
push button wireless setup and network security
Front-mounted USB port allows for easy connectivity
for USB hard drives, memory sticks, and card readers
*54 Mbps is the IEEE 802.11g standard theoretical maximum and does not represent actual data throughput