(first of all, it’s not a free software.
but it has its place, like many many other things around you — right now.)

some of the interesting new/improved features:

– Chip Multithreading (improve performance)
– N1 Grid Containers (improve utilization)
– Predictive self healing (reduce downtime)
– Dynamic File System (reduce admin works)
– DTrace (real-time system tracking)
– Cryptographic infrastructure (security)
– Process rights management (security)
– Zones (security, resource management)

full details @ sun.com

—-

Sun engineer’s blog on Solaris 10 Resource Management and Zones