Was looking into these multimedia drives also and went for the
IOMEGA 1T Multimedia Drive for a valuable €179.00 in Spain.
Installation was as simple as the tin said, plug the cables, power it up, allow the home network to have a new IP-unit attached and that was it.
The interesting part is that all PCs in the home network see the drive as a simple HD, incoming streams can be stored on this drive while viewing other videos. Also, the extension of using all available HD in the house via the LAN makes this an unlimited storing device. Even the test of accepting a simple USB-HD worked charming....
With a DynDNS address streaming from home to my hotac is hassle-free....
Now that was some experience...