Within Sun the Architectural Review Committee (ARC) are involved for certain changes to software (including Solaris) and firmware. I don't want to get into too much detail on the exact role of the various ARCs but those interested can visit the OpenSolaris ARC Community pages.
You can keep up-to-date with new cases as they are logged by following ARCbot either via Twitter or the RSS feed. Data is fetched from a handy csv file hosted on opensolaris.org.
Without further ado, the two feeds:
Any comments/suggestions, leave a comment, email me, or send a tweet to @lewiz.