IBM now has a press release out on DB2 pureScale and related technologies. What I found impressive is the scale-up test to more than 100 Power systems with still a productivity rate of around 80%. More on DB2 pureScale and the technology over the next weeks.
The official website seems to be here: http://www-01.ibm.com/software/data/db2/9/editions-features-purescale.html (I got a broken link when I clicked into the press release)