Dell NX1950 NAS Question

[Rogers, Jamie]

Does anyone have any experience with Dells NX1950 NAS system?  I'm looking for another storage solution and I'm looking for some anecdotal reports.  I have a mixed Solaris, Linux RHEL, AIX, HP-UX, and CIFS, environment that serves a number of HPC for simulations.  I currently use Netapp's to serve the data but I'm getting maxed out there.  I really don't like the thought of using Windows Unified Data Storage Server to serve up files to Unix through NFS but I'm willing to listen to what others have to say about their experiences.  I know that Windows 2003R2 is not certified for a number of OS's that I support, but I'm not sure about Windows UDSS.  I'll spend some time reading on Mirosoft's site but I'm still interested in what other users have to say.  
 
Thanks in advance,
Jamie