acpi_ibm seems to work just fine. No issues noted.
Suspend/resume does work! (with FreeBSD-head at r265781)
To make a dock appear as a secondary audio device, put the following in /boot/loader.conf
hint.hdaa.0.nid28.config="as=3 conn=Jack"
hint.hdaa.0.nid26.config="as=4 conn=Jack"