Finally, after months of delay, the SDcard bits have been putback^Wpushed.
This was interesting, because the SDcard bits were also some of the first bits to have been pushed into the new Mercurial tree -- and they're already in the clone. Adventurous people can start trying the code out now. Or just wait until b97.
Of course, this also means that this will be a new feature in the OpenSolaris 2008.11 release. Yay!
If you do try the bits out, let me know what works, and what doesn't. There seems to be some evidence from the Linux community that not all SDHCI compliant controllers are created equal, although the code I have works for the few variants that I've had access to.
The bugster category for bugs is solaris/driver/sdcard