Solaris 10 10/09 hit the road
Without any hype a new Solaris 10 release has seen the light with bunch of glowing features, i.e. caching devices support in ZFS, ZFS user/group quotas, zone parallel patching, callout subsystem enhancements, etc. Please, visit the original “What’s new” document at docs.sun.com for more details.
Update. Just have came across a useful link that could help you to find a way in Solaris release names