I just bought the Imation Apollo portable hard disk, here in Lima. It cost me 125 US$
My first thoughts are that it is very very small (LxWxH) 127.4mm x 80.9mm x 17.2mm) and so quite. I know that’s working just because there’s a light on.
It works with Windows® 2000, XP, Vista, Macintosh Mac OS 10.2.8 and Linux (tested with Ubuntu 8.04).