I agree - I can't believe Sun are quite that stupid, but I've been wrong on that score before, and they do have a reputation for buying and burying things.

If you'll excuse the shameless link, I've written up my thoughts in more detail here, and in the last /. post on the "SunDB" matter back in Feb, a bit of agreement was to be found on the Clustra theory. My disclaimer is, I suppose, that I've worked with and used Clustra, and live in hope Sun will see the sense of their purchase.