If you're wondering how to get your company out of the "silo structure" that often kills innovation and cross-company communication, social networking might hold the key, and I don't mean Facebook or Twitter. At GE, we launched a private online community in March of this year to connect our 5,000 global marketing professionals in real time. It's called MarkNet, and you might think of it as blogging and Facebook for our GE marketers.
