SQL Server 2005 Service Pack (SP) 2, which is designed to work on Windows Vista and Longhorn Server test builds, is expected to go live any day now.
On his "Semi-Useful BI Musings" blog, Russell Christopher said that the latest SQL Server version will be "most likely available" on Monday, February 19.
"Get ready to download, because SP 2 was declared 'ready to ship' last night," Christopher blogged on February 16. "The SQL team is hoping to have it ready for public download Monday-morning-ish (PST)."
SQL Server 2005 SP 1, which Microsoft made available for download in April 2006, was not Vista-compatible, largely as a result of User Access Control/administrator rights changes introduced with Vista.
Microsoft began warning users of SQL Server 2005 Vista incompatibilities last Fall.
Microsoft rolled out Vista to business users on November 30, 2006. The final version of Longhorn Server is due to ship later this year.
Update: Microsoft SQL Server Consultant Benjamin Jones lists some of the new features and fixes due in SQL Server SP2. More on the new SP2 features from Microsoft Downloads. (Original link to these resources is here.)