The most recent set of fixes for SQL Server 2005, the Service Pack 1 QFE Rollup, is available for download here. The linked page currently includes instructions in seven languages as well as links for downloading all of the updated components. You'll also find a list of the hotfixes included in the QFE Rollup.
One month to a QFE Rollup is pretty quick turnaround by the SQL Team, don't you think? The March CTP of the Service Pack was released on March 19th, the Service Pack itself on April 19th, and the QFE on May 18th. Awfully impressive, if you ask me.
(apologies for the comparitively late notice on the QFE; I'm still crunching that code I mentioned last time, and this nearly flew under my radar)