Journal Citation Reports recently released data for 2008. New metrics and features include:

• 5-Year Journal Impact Factor is the average number of times articles from a journal published in the past five years have been cited in the JCR year. For journals in subjects where citation activity continues to rise through several years, this metric allows more of their total citation activity to be included in a critical performance metric.
• Eigenfactor^TM Metrics, comprising the Eigenfactor^TM Score and Article Influence^TM Score, use JCR citation data to assess the influence of a journal in relation to other journals. These metrics, based on five years of citation activity, consider not just the count of citations but the structure of the citation network. Eigenfactor Metrics are available only for JCR years 2007 and later.
• Journal Self Cites provides analyses of journal self citations and their contribution to the Journal Impact Factor calculation.
• Rank-in-Category reveals the ranking of a journal in its subject categories based on the Journal Impact Factor. An accompanying Impact Factor box plot depicts the distribution of Impact Factors for all journals in a category.