We have a Synology NAS review in the works so watch out for that in the next few weeks, the control software is a particular highlight of that product.
There were a few interesting items on show at CeBIT which included a 5 bay NAS/Server which solves storage problems by allowing the connection of a second identical unit via proprietary eSATA cable. Fill up 5×2TB, no problem… just ad on this second unit and double up to 10TB… should last even the biggest media junkies a few years.