Upgrade really isnt the right word, you cant upgrade an SUS server to WSUS (too bad, seems like a no-brainer). I followed the directions to do a side by side install of WSUS (I still call it WUS casue its easier to say ) on my SUS server, Set up a test client, made sure it was working and decommisioned my SUS. Almost all of my clients have reported in and started downloading stuff (I know this because of the report generating capabilities!) and man is there a lot of stuff that you can push now, Like the latest word vulnerabilites patch etc. I'm not real comfortable with the interface yet, but its definitly a class act. Good Job M$!