I can’t read the Japanese, but from the Flash animation, it appears that Sony is offering a 20GB portable WiFi file server.
More information is available via the German site Computerwoche (”Computer Week”), in article: Sony announces WiFi Fileserver in the Walkman format (Google translation):
MUNICH (COMPUTER WEEK) - Japanese electronics company Sony has a portable file server presented which, which kommunziert over Wireless LAN with PCS and PDAs. The “Fsv-pg1″ works with a Linux based operating system and contains a 20-GB-Festplatte in the 2,5-Zoll-Format, 17 GB of it is available for user data. The equipment fits with masses of 83 x 155 x of 31 millimeters loosely into a hand and weighs 390 gram. For the enterprise all thing a power pack is necessary, the internal Akku serves only for baking UP purposes.
The inserted ACCESS POINT (IEEE 802.11b) can serve according to manufacturer up to 250 users at the same time. Access to the stored files is possible over ftp, CIFS (Common InterNet file system) or NFS. By a Ethernet Cradle available as accessories the equipment can connect accessing Clients by WLAN in addition with the InterNet. As safety functions the Fsv-pg1 incoming inspection coding with alternatively 64 or 128 bits offers, stored files can by password be protected.
On the Net&Com 2003 in Tokyo the equipment is presented today to the public for the first time. It is to come at the end of March for converted 585 dollar on the Japanese market, the Cradle costs again scarcely 60 dollar. Whether and when the equipment appears also in this country, is not well-known.
You might call the kind of drive-by file sharing enabled by such devices “warsharing”.
Would you grab files from a server which temporarily appeared within your wireless range?