If GNOME Power Manager 2.14 doesn't suit your needs or you are looking for the latest packages, GNOME Power Manager 2.15.1 was just released. GNOME Power Manager 2.15.1 incorporates a number of changes in the release from general features, power management, power preferences, power information, and translations. Some of the notable items in this release are the icons switching to using the Tango style, new throttle API for gnome-screensaver, appropriate response when systray crashes, monitors more gconf keys, checks to ensure lower brightness when idling, and the new information page showing a simpler view of hardware. More on GNOME Power Manager 2.15.1, and this project in general, is available at the site.
With the start of the GNOME 2.15 development cycle, additional projects have begun to announce new unstable packages such as Gnome-utils 2.15.0 (Growing Family), GnomePython 2.15.1, GnomePythonDesktop 2.15.1, vte-0.13.0, and Pango-1.13.0.