No Andi I don't use a Sonnet SATA-card and I don't plan to use one anytime soon.

There is a similar PC card that I bought of ebay for 2.27Euro which after some misunderstandings should arrive here tomorow and for which I might even have found a fitting PPC-flash.

Analogkid has that Sonnet-card (mine only has a Sonnet 2x1.8GHz but thats a different matter).