Apple has introduced a range of firmware-related software updates for Intel Macs along with an update for AirPort Extreme.
Firmware updates include one for the Mac Pro (Mac Pro EFI Firmware Update 1.3) and another for the creation of restorative firmware installation CDs for Intel Macs (Firmware Restoration CD 1.5).
Tiger users get the AirPort Extreme Update 2008-001 for Tiger. That update is recommended for all Intel-based Macs running Tiger and is designed to improve the reliability of the AirPort connection.
Firmware Restoration CD 1.5 is software that must be installed on a CD and is used to restore the firmware on Intel-based Macs after an interrupted or unsuccessful update.
All the updates are available for download here.