Socialwok is a free add-on for Google Apps that you can pick up at the Google Apps Marketplace. I installed it a month ago but have never really been able to connect people in my office using this app. I know it’s working, but it still does not really seem to be adding much interaction. I’ll keep trying and let you know if it truly does the job. In the meantime, here’s a video about using Socialwok with Outlook. Enjoy.