General Guidelines
http://magiccityslingers.wordpress.com/why-babywear/babywearing-safety/

Is my Sling Safe?
http://www.sleepingbaby.net/safety.php?PHPSESSID=db425c895f7a58b2d774e9b77fc5e3ea

Search results for baby carrier on the CPSC recall site (remember for some of these it was a specific batch)
http://search.cpsc.gov/query.html?col=epi&qt=baby+carrier&charset=iso-8859-1&col=pubweb

CPSC article on sling warnings and safety
http://www.cpsc.gov/en/Newsroom/News-Releases/2010/Infant-Deaths-Prompt-CPSC-Warning-About-Sling-Carriers-for-Babies/

CPSC article on Infantio SlingRider deaths
http://www.cpsc.gov/en/Recalls/2010/Infantino-Recalls-to-Replace-SlingRider-Baby-Slings-Three-Infant-Deaths-Reported/