I've mentioned this is another thread, but since it directly answers your question....

I've recently bought a KiSS DP-508 for exactly what you are describing.

http://www.kiss-technology.com/

Works great over 802.11g and there is a model without internal storage DP-500, but I wanted yet another location to backup all my music to that I could sync over night.

Also check out the forums here http://www.gooddvdstuff.com/kissdvd/index.php

Most of the posts sound like the product is rubbish, but if you are ripping your own movies rather than downloading anything and everything it is a great product.

3 mates saw mine over Christmas and ordered one on the spot - www.scan.co.uk has the best uk prices right now.

Phil