funny enough, it looks the same as Backup Exec CPS (aka Continuous Protection Server). CPS is just excellent, but BE tech support is poor, pretty poor. I'll wait a bit for PureDisk, look at the user manual and there are more pages for the T'shooting than the rest of the manual !! !!
We just got done evaluating this. Pretty cool technology. The single instance store works as advertised. After the initial backup, the average backup was about 60MB or so (where the average incremental for Netbackup was around 1-2GB for the same server. it is very new and there isn't really any integration with Netbackup yet. We are pretty much going to hold off until some of this is built into NBU (they are planning to eventually have basically a storage optimized DSU option that will use this technology at some point)
This is definitely a product to learn about! Currently it is a separate product that is being blended into Netbackup. It is in the development roadmap for NetBackup for a complete integration. Look for it to completely replace the NetBackup tar