This past year was an exciting one for CiviCRM. We experienced an exponential increase in the number of downloads, and a strengthening and diversification of our active community members. International adoption and translation activity also increased - although we like to see more growth for this in 2007.
David Geilhufe has created an excellent "year in review" document which covers the highlights. I've attached it here - feel free to share it around with folks who might be interested in using or contributing to the project!