Ruslan Fazlyev

There's a question hanging over newly IPO'd Facebook that's generating a lot of discussion: Is social commerce — i.e., having an online store within Facebook or another social site — working? This comes after a few big brands, including Gap, GameStop and J.C. Penney, closed their failed Facebook stores earlier this year.General Motors pulling its advertising from Facebook didn't boost confidence that the social networking site is effective at generating income for businesses other than itself.