Chris Pirillo has posted some additional news on what is happening with the first service pack for Windows Vista. He starts:

• The beta will be released to a moderate-sized audience in a few weeks.
• With SP1, Windows Vista can boot via EFI (Extensible Firmware Interface) on an x64 machine
• SP1 supports ExFAT, a new file format that will be used in flash memory storage and consumer devices
• Support for SD Advanced DMA Support to improve transfer performance and decrease CPU utilization is part of SP1
• SP1 includes a series of new API’s and software features to enable 3D application and game developers to make more complete and efficient use of the upcoming generation of graphics Direct3D 10.1 hardware

Read the rest over on Chris’s blog.