The OpenIndiana developers collaborate on #oi-dev on irc.freenode.net.
Also the Solaris kernel is excellent and has features that put it ahead of the game in many areas. Take Solaris Zones, the fully virtualised network stack (crossbow), the COMSTAR SCSI (iSCSI/FCoE) target framework, the Fault Management Architecture (FMA), along with a whole host of other advantages, put it significantly ahead of the game. Also thanks to Joyent the illumos kernel supports KVM, something FreeBSD does not.
http://src.illumos.org/source/xref/illumos-gate/usr/src/comm...
lines 158 thru 171... are just one example.
While yes, you could find this anywhere in any code base, we're talking about OpenIndiana. If this kind of issue is present in the file system handler, there's NO way this project is ready for prime time, never mind a production release.
The illumos kernel is derived from the Oracle Solaris source code tree. Solaris is an enterprise UNIX system used to power some of the largest financial systems in the world.
So if that's not ready for primetime, then perhaps you'd care to elaborate on what is?
I still like Solaris for SMF, but I consider the policies of Oracle, and the ...uncertainty... of illumos to be important considerations.