TwonkyVision 3.1 is part of the list. Although I've never used one myself, but many friends have already installed the IntraDisk with this UPnP server pre-installed on it.
Here's a link to products with Twonky:
[Link: twonkyvision.com]They have a list of other NAS drives which you can install the Twonky if you know a bit about Unix,...
Cheers and let's get ready for the big 007!