Harmony,The Loft, & Blossom offer workshops on baby wearing. You are able to test various carriers, learn the benefits of wearing your baby, and learn the safest way. Blossom also offers a monthly baby wearing group.
Babywearing International Inc. is a nonprofit organization whose mission is to promote babywearing as a universally accepted practice, with benefits for both child and caregiver, through education and support. Their webpage offers information, resources and links to local chapters, including one in the Bay Area.
Pediatrician and author of The Baby Book and a large parenting resource library. He shares information, benefits & safety on baby wearing among many other parenting topics.
Great information on how to navigate choosing a sling or carrier, safety aspects to consider, and various positions.