According to the IEEE 1394 Website:
The 1394-2008 standard updates and revises all prior 1394 standards, including 1394a™, 1394b™, 1394c™, enhanced UTP, and the 1394 beta plus PHY-Link interface. It also incorporates the complete specifications for S1600 (1.6 Gigabit/second bandwidth) and for S3200, which provides 3.2 Gigabit/second speeds.