Do any current (early 2012) Macs support Intel's Smart Response Technology (SRT)

Intel's SRT uses a small SSD (up to 64 GB) as a cache for the hard disk. Or just the first 64 GB of a larger SSD. Per this Intel document this needs a Z68 Express board and Windows Vista or 7. Various sources say the 2011 iMacs use the Z68 chipset.

Is this supported, or an equivalent feature, on any current Mac? If so, where can I read more?

There is no current implementation of this technology in the current iMac with the requisite Z68 chipset, or any other Mac. I'm not even sure that any other Macs from this (last?) year have the Z68 chipset!

As pointed out by GEdgar, the "Fusion Drive" is a similar feature. However it is a software solution, from what I read