There's a slightly imperfect press release: Sun Announces Dual-Core Technology Across Entire x64 Server Product Line.
For one thing, Sun's x64 server product line consists of two models in its entirety, and even then they've only actually announced dual-core on the V40z. Ho hum.
I still want one!
One of the annoying aspects of working at an institute facing imminent closure is that we simply can't get access to any of the exciting new technology that's emerging. Hence the title, which describes how I feel right now.