HP started shipping a new breed of Windows Storage Servers demonstrated at TechEd Berlin. They've a portfolio of Windows Storage Server 2008 R2 products now available; from the small-business X1000 to the enterprise-grade and highly available X3000 series.
These machinery can serve up storage for thousands of users using all your favorite protocols like SMB2.1, iSCSI, NFS, HTTP, FTP, WebDAV and many more. Plus it comes with a bunch of hardware, software and data management capabilities that no previous storage offerings have put together in one package.
Check this video of the servers running in the HP Labs done by Calvin Zito and Jim Hankins: