Just a short list of Post SP1 hotfixes that I always forget about when paving a machine.
KB958502 - JScript Editor support for “-vsdoc.js” IntelliSense doc. files (same hotfix for both x86 and x64)
KB957912 - Update for Visual Studio 2008 SP1 Debugging and Breakpoints (same hotfix for both x86 and x64. additional x64 reqs)