On Wed, 19 Jan 2011 10:10:49 +0000, Rob wrote:

Wouldn't it be cheaper and easier to add a WiFi card to the computer?
Maybe try a USB device such as the Netgear WG111

A USB WiFi dongle would be my prefered approach.

PC powered so goes off with the PC, nothing can hack into something
that isn't powered...

No extra wall wart to find a socket for, no extra power consumed when
the PC isn't on.

--
Cheers
Dave.