There are lots of rumours around the Internet about an upcoming Windows Vista Sevice Pack 1. I can only say that it will be welcome - there are lots of small things that could work much better on Windows Vista - including some ReadyBoost problems, SD card support, slow shutdown and other minor annoyances.
Mary Jo Foley lists on her blog
fixes we could expect to see:
* Performance tweaks lessening the amount of time it takes to copy files and shut down Vista machines (Yeah, I know Microsoft said Viista shutdown speed wasn’t an issue. Guess users weren’t so crazy, after all.)
* Improved transfer performance and decreased CPU utilization via support for SD Advanced Direct Memory Access (DMA)
* Support for ExFat, the Windows file format for flash memory storage and other consumer devices
* Improvements to BitLocker Drive Encryption to allow not just encryption of the whole Vista volume, but also locally created data volumes
* The ability to boot Extensible Firmware Interface (EFI) on an x64 machine
* Improved success rate for firewalled MeetingSpace and Remote Assistance connections