I'm currently planning for the upgrade of our notes clients from 6.5.0 to 8.0. I have set up smart Upgrade to do this. The only problem I am having is users do not get automatically prompted when logging onto notes to upgrade. The upgrade works though if they go File-Tools-Smart Upgrade. I think this may just be a limitation with the 6.5.0 client, but not sure.
At the moment our servers are still 6.5.6, about to be upgraded soon.