Like Shiri mentioned, not an enclosure, but a media player:
Asus O!Play. I've had mine for months and I love it. There is a new model that is
wireless too.
-Integrated 802.11n - Stream YouTube, Flickr, Picasa and Weather.com content.
-Play the lastest video and audio formats on the PC (including Real Media)
-Expeience HD 1080p output
-Multiple input sources through eSATA, USB, card reader, wireless, and LAN. Stream your content from an external HDD, Media Cards, PC, or NAS device.
-Media Browsing - Simple yet powerful interface to allow you to sort and search for your media files. Also allow music shuffling as well as quick movie preview to enhance user experience.
-Hassle-free multimedia playback without file conversion
-Full 1080p high-definition video via HDMI output
-High-speed wireless 802.11n / Ethernet LAN connection for easy network streaming
-Simple and fast plug-and-play connectivity (eSATA, USB 2.0, CF, SD+MMC, MS+MS Duo)
-Bitstream or decode Dolby Digital Plus and DTS Surround audio
-Sleek and compact design
-Instant music playing with dedicated Music Shuffle remote button