Here are some of my favorite books for helping parents help their kids develop social skills. Some of my friends have reported seeing great gains from professionally lead social skills therapy groups - sometimes called 'friendship groups.'

Friends Forever: How Parents Can Help Their Kids Make and Keep Good Friends by
Fred Frankel

and
http://www.amazon.com/Transforming-...F8&qid=1307279959&sr=1-1-catcorr

Between those 2 you'll have plenty to get started with!
Love and More Love,
Grinity

Coaching available, at SchoolSuccessSolutions.com