The following list is not a complete list, but based on the site description it may help you narrow down which social sites would be best-suited to your business.

AgentB

AgentB is a place to find and share great deals from across the Internet. Users can discover deals and share them with friends by "buzzing" them up to the homepage. Online Web shops can buzz coupon codes and sales.

Bebo

Bebo is a social networking service where members can stay in touch and connect with friends, share photos, discover new interests and just hang out.

Blogger

Blogger is a free blog publishing tool from Google that lets you quickly and easily share your thoughts with the world.