Dr. Shawn McCandless and the Committee on Genetics at the American Academy of Pediatrics have just published "Clinical Report: Health Supervision for Children with Prader-Willi Syndrome" in the Journal of Pediatrics. The article is available for download (free!) here: [McCandless, 2010]. It gives a nice overview of PWS and diagnostic issues, then provides guidelines for the general pediatrician at all stages from birth through the transition to adulthood.
This should serve as an great resource for pediatricians and general practitioners-- be sure to take a copy to your next visit!