In November I already pointed out AMD official slides reporting part of the virtualization strategy roadmap.
On this AnandTech article you can find a much more detailed roadmap providing raw dates, socket details (the reported M2 socket is now known as AM2), and processors codenames.
Meanwhile AMD collected a nice amount of Pacifica material on the dedicated website:
- AMD Pacifica Virtualization Technology overview
- AMD: WebBench Virtualization Performance Study
- Virtualization with AMD & VMware paper
I also remind you that Pacifica specifications are available here.