About.me provide a beautiful single page for you are your bussiness. it's not a social network, and i believe it's good for personal usages, not bussiness.
It's good for a personal page to add some information about you, your business / website and have links to your site and social media. It's not very interactive though, unlikely to drive much targeted traffic. I like the site though.
Seen the site, the Page rank is 7 and alexa rank is also very good. Let me try this site once. Thanks !