Are you concerned about homeschool socialization or do you have a family member bugging you about your children not being socialized? I've written a post all about ways that homeschoolers can interact with others. Most homeschoolers naturally use these ideas, but there might be a few new ideas in there that you hadn't thought of.
Although I believe that homeschoolers get plenty of socialization from interacting with their parents and siblings, if parents have an only child or just feel like their child needs a little more outside interaction, these ideas should help them.
Homeschooled children are some of the most socially secure people I know. They have been nurtured by people who love them most. They didn't have to worry about being ridiculed in first grade for not having the right clothes or carrying the right kind of lunch box. Getting to spend lots of quality time with people who love them is one of the best ways to build a child's confidence. Then once they get older, they have more skills and confidence to be able to face the world around them.