Most noteably the SONAS system created lots of interest. You can find details about it on IBM's storage website.
In addition, I have summarized a couple of valuable press articles about the scale-out-NAS topic for you:
Related to the ever-present cost discussions in datacenters, this article discusses the real or perceived cost advantages of FCoE.
While Hu Yoshida in his well written post asks the question you have had in your mind probably as well: "If I'm doing more with less people and disks are getting cheaper, why are my costs increasing?"
His answer to the problem is "storage virtualization" and I absolutely have to agree!