The ASUS WL-HDD is a little $85 computer with room and connections for a 2.5" 
hard disk drive. It is masquerading as a "WLAN Hard Drive Box". It has 2 
wired Ethernet ports and a 802.11g wireless card, as well as a USB 1.1 port. 
It looks as if it might also work as a wireless access point.

http://usa.asus.com/products/communication/wireless/wl-hdd25/overview.htm

Seems to be related to the Linksys routers, not surprisingly. I think it has 
32Mb RAM, 4Mb flash, and a 200MHz processor.

And of course people are making custom Linux versions for it. Asus has posted 
the sources for the GPL-derived bits of their firmware.

http://www.openwrt.org/OpenWrtDocs/About?action=show&redirect=OpenWrt

-- 
Ned Konz
http://bike-nomad.com/squeak/