It seems this came out on April 20th, but I did not catch it at the time. Better late than never, I guess. As Sean Nolan pointed out in a previous post, CU#3 includes many of the fixes that were available in SP2 CU#13 and not in SP3 CU#2. You can download the hotfix (which puts you to 9.0.4220) here:
Fellow MVP Geoff Hiten (@SQLCraftsman) asked if this is the Cumulative Update that contains the new trace flag for 'lock pages in memory' on Standard Edition. Alas, it is not. As I mentioned previously, we are getting this in CU#4 for SQL Server 2005 SP3 (expected in June) and CU#2 for SQL Server 2008 SP1 (expected before June).