Solaris Nevada b73, when it comes out, is going to have a lot of good NIC stuff in it.
* afe driver (putback yesterday)
* mxfe driver
* rtls on SPARC (including suspend/resume!)
* qfe GLDv3 support
Plus, there are a lot of good networking improvements; a lot of stale code was removed (defunct mobile IPv4 support, detangling NAT, etc.)
There's a bunch of carryover from snv_70-72 too...
I for one, can hardly wait.