I want to connect a pendrive throuth the ethernet port on a linux OS. Is that possible ?
I did find this on ebay, USB-male to ETHERNET-female, is this of any use?
The eBay auction you pointed to reminds of devices where you can extend USB connections over CAT5 wiring. That would extend the range the USB device can be from the computer, but the device I'm thinking of is not compatible with IP networks, it merely changed the electrical wiring from a USB cable to CAT5 cable.
I agree with hyperslug that the NSLU2 would work, which is still available.
I did a quick search and found Addonics NAS Adapter which is probably closer to what you were looking for.
Hope this helps.
EDIT: Found another Hitachi SimpleNET NAS, this one has two USB ports.