Windows Vista SP1 lacks "wow." Missing are enticements such as a new version of Internet Explorer, which Microsoft provided in Windows XP SP1 back in 2004, or some other must-have feature. This time it's just a rollup of past security patches and enhancements to existing code. Yawn. That said, it's still worth having. At present only 12,000 beta testers have the code. General release is expected in the first quarter of 2008.