The 2007 Impact Factors were published yesterday by Thompson Reuters.

The Impact Factor of Molecular Systems Biology for 2007 is 9.954

This represents a substantial increase over last year's Impact Factor (see chart) and we would like to warmly thank all our authors and reviewers who have contributed to this success. We will continue to work very hard to maintain the high standards of the journal and promote innovative and insightful research in systems biology.

The significance of Impact Factors suffers from intrinsic limitations (see Ian's post) and interpretation of this metric is subject to much discussion (Rossner et al 2007, Thompson's Citation Impact Forum). These and other questions related to bibliometrics are also currently debated at the Nature Network Citation in Science group.