I did it. Its worth it. Dont worry about Sata type because the transfer rate is really what matters. I posted a pic up to show just how fast the SSD was over the HDD. (5x faster!!)
transfer rates of a hdd read mode : 66
transfer rates of an OCZ Vertex 120GB SSD: 250+
Makes my s12 feel as response as my Core2Duo corporate T61.
Just do it. trust me.
Onyx S10, 2GB Ram, Bluetooth 2.1, Wireless N, Win7
Onyx s12, 2GB RAM, 120GB OCZ Vertex 2, Win7