1. It's a good intranet alternative. Most companies have an intranet meant to facilitate employee collaboration and act as a portal for company information. But employees often use it so infrequently that they forget their passwords. Lawrence DeVoe, chief technology catalyst at Initiative Media, deployed Yammer last April, starting with 10 invites, and within three weeks had gained 400 users. Today, the Yammer population at the company has grown to 1,400. And DeVoe says Yammer cost less than half of what was spent on his previous Intranet tool.