Collaboration for the Masses: "Is your business spread across multiple offices? Does it work closely with outside clients? Do you spend your day trying to collaborate with faraway people via phone and e-mail? If you answered yes to any of these questions, it's high time you adopted an Internet collaboration tool—a set of graphical applications that lets you easily interact with colleagues via your own private network."
Comment: The article unfortunately doesn't include any of the (often more exciting) decentralized options available - plone, wikis, convea, ACollab, Drupal, etc. A tool like plone, for example, has a healthy development community, is based on open standards, and has many additional modules available (chat, wikis, blogs, discussion forum, etc.).