Yammer raises $17M from former Facebook VP to improve enterprise social networking

Since its launch in 2008, Yammer has made incredible gains with enterprise users, with more than 3 million verified corporate users and more than 80 percent of companies on the Fortune 500 list using the network. It has attracted more than 100,000 businesses in 160 countries. The service tailors Facebook and Twitter-like communication strategies to give businesses activity feeds, private messaging, polls, Q&A and more.

Google Plus struggles to add women after mostly-male launch

Since the launch of Google Plus almost two months ago, Google’s social media network has grown faster than any other network, reaching over 20 million users in just a month. Google’s invite-only launch positioned Google Plus as a male-centric network, and early Google Plus adopters were quick to criticize the initial gender ratios.