I'm pretty sure that the A8N-SLI series (regular, deluxe, premium) all have SATA2 support on them, on both the nVidia chipset and on the SI one as well. Don't know about VIA though....
ah yes, I guess I also meant to say NON-SLI and actually AGP based as well... I don't really want to upgrade my video card as I just bought one a few months ago...