Please have a look at this, it is certainly relevant for our cooperation with US colleagues:

"On 17 July, deputy director of the European Grid Infrastructure, Catherine Gater and project coordinator of e-Science Talk, was at the XSEDE’12 conference, in the Windy City, aka Chicago, to hear the update from XSEDE's principal investigator about the breadth of scientific, technical, and social aspects of cyberinfrastructure, or e-infrastructure, as it’s known in Europe."

www.isgtw.org/feature/building-new-bridg...ween-xsede-and-prace