If you are in the business world and you have time for another social network you may have heard of LinkedIn. It allows you to connect to millions of like minded individuals across the globe. You can use it to research prospective employers or new employees. You can also use it to connect to your network to ask questions or share info.
Get on-the-go access to your professional network with LinkedIn for Windows Phone. Find and connect with more than 150M members worldwide, read the latest industry news, keep up-to-date with your groups, explore jobs you might be interested in, and share content with your network from anywhere.
The nice thing about this is the design of the app. The developers have actually looked at the Windows Phone Metro style and made the app in the same style. It really does look nice, so nice in fact I am tempted to sign up just to use the app.