A true contact management system is one that is fully integrated.

I have purchased Virtual Filing Cabinet for my office, the example given in this blog, and I am amazed at its power. With a single click, I can easily access a complete, integrated view of all the emails, documents, notes, calendar events, voice recordings, faxes, telephone conversations, as well as other activities, related to my contact or task. In addition, Virtual Filing Cabinet gives me the ability to add all my email accounts, including Gmail and AOL, and offers complete synchronization and importing of all my Outlook email, contact and calendar information.