That helped me as well, after SP1, CU1, the Software Summarization was set to run every hour, and had my SQL pegged. We went from 4 to 6 cores, same thing, bumped it to 8, same thing... If you're looking for where summarization is, right click on "All Software Updates" under Software Updates in Software Library, and you'll see summarization. It was set to every hour, so I changed that to 1 day, and it's much happier now.