Sparc: All T3 and T4 series of systems support Oracle Solaris SR-IOV capable devices.
x86: Intel Nehalem-EX based systems such as x4470 and x4800 support Oracle Solaris SR-IOV capable devices.
The following cards support SR-IOV capable devices:
Intel based NICs such as Kawela (82576, 1G)
Niantic (82599, 10G)