I have seen one ad banner for Serial ATA and there was a DFI motherboard with a SIS chipset that had Serial ATA ports on the motherboard on toms hardware.
http://www17.tomshardware.com/mainbo...sis648-04.html
I expect a lot of Serial ATA Motherboards to be out in the next 2 months or so. That is when you should see some drives coming out.