It's been a standard feature in Intel/AMD cpus since 1995.
CPU manufacturer VIA has added AES acceleration to their C7 line of CPUs (I suppose Intel/AMD have with their newer CPUs as well). I'm wanting to build a matched pair of routers connected over a gigabit line, with a VPN between them.
Phoronix: New AMD Processors Supported By Coreboot
While Coreboot support for systems with newer Intel CPUs is tough, Coreboot gained yesterday support for some new AMD CPUs...