JIRA 3.13 introduces several new features including shareable dashboards, enhanced sub-task creation, progress bars, and the ability to edit active workflows. It also includes over 200 bug fixes and improvements to loading speed. The document provides details on the new features and links for more information on the release notes, upgrade guide, and download page. It also discusses upcoming webinars, user groups, and future plans for JIRAQL, UI improvements, and engine room work in 2009.