I saw Brian's post on Microsoft's post on post sp2-fixes. Say that 10 times quickly.
They do a good job explaining it and I'm actually releasing a link Monday to it so people can understand what's going on and what they should install to be current.
The one thing that I'm missing is that there's no explanation of why or how these problems surfaced. At least two of these fixes are just plain shoddy work, not bugs. At the very least, what the SQL Server community is missing is an apology for the hassles of installation and problems from Microsoft. I think it's appropriate and it would go a long way towards repairing the anger some people have.
