I have got a Dlink DIR-655
This has a USB port on it that you can add a HD to it.
Have been using it for about 5 months now and it has crashed once.
http://www.amazon.co.uk/exec/obidos/...SAII/sh-9-1-21
Also a review
http://www.trustedreviews.com/networ...ter-DIR-655/p1
They wont mention the fact you can use the USB to add a HD as it has just been released in the latest frimware (30/12/08).
Cheers
Pic attached with my flash drive plugged in