You can get it here. It seems to be one of those services packs with more enhancements behind the scenes, however I did find a nice page with a list of bugs fixed with this service pack. It’s interesting reading , and you can find it here.
In terms of reporting services there are 2 bug fixes listed , namely :
|961271 (http://support.microsoft.com/kb/961271/ )||FIX: In a SQL Server 2008 Reporting Services report that contains several levels, some items disappear when you collapse another item|
|961633 (http://support.microsoft.com/kb/961633/ )||FIX: A SQL Server 2008 Reporting Services report is displayed incorrectly in Mozilla Firefox if the report is displayed by using the ReportViewer control|
Anyway , I’m planning on installing it today , and I’ll update this post if I find anything interesting post installation.