Doubt there is one yet; wikipedia seems up to date on this at least:
http://en.wikipedia.org/wiki/Compari...aces_and_ports
The only one with two SATA ports seems to be the VIA with an x86-64 processor.
[EDIT]: I take that back; there seems to be activity in the NAS market; eg.
http://www.anandtech.com/show/7724/i...-opteron-a1100
For that matter, an older Kirkwood ARM SoC, like the ix2-200, has two SATA ports; you could cannabalize one of those.