TC50: Yammer launches as a Twitter for businesses, unless you want the open-source version

Twitter is great. Send short (140-character messages) about what you’re doing right now and read the mercifully short yet informative messages from friends. So Yammer, launching today (and pictured above), wants to be the Twitter for businesses. It asks “what are you working on right now?” so you and your coworkers... (Read more)