DailyTech reports Windows Vista won't feature IEEE-1394b (FireWire-B) support at launch.
1394b is the backwards compatible successor to 1394a and will feature a theoretical maximum speed of 3.2Gbit/s to or from a single device. 1394 is a popular standard for external hard-drives and is featured on most new digital camcorders. The standard was announced in 2001, but still has not made its way into the mainstream.
Windows Vista has been plagued with dropped features and delays and may be facing another 3 month delay according to some analysts. This is yet another blow for the software giant as both Mac OS X and Linux support 1394b already. A new build of Vista, 5381, was just released to MSDN testers this weekend.