Last major update, Summer 2015: Early work on this data resource was funded by an NSF Career Award 0237918, and it continues to be funded through NSF IIS-1161997 II and NSF IIS 1510741. Discontinued! There is now a larger archive here. We suggest you begin by reading the briefing document in PDF or PowerPoint, which also contains the password. Then you can download the entire archive (about 350mb