The International Center for Nephrogenic Fibrosing Dermopathy Research (ICNFDR) is maintained by Shawn Cowper MD of Yale University School of Medicine. It offers an excellent overview of NSF.
Another very useful overview of NSF at eMedicine.com.
NSF support group at Yahoo.com
PubMed is the website of the National Library of Medicine, and a good place to search the medical literature.