FYI, I've a Dell D610, and have stopped using resume windows. I ether shut down fully or use stand-by. The reason, I installed a 160GB disk at the start of the year, got everything moved over and running, and a resume operation trashed the boot sector somehow a few days later. Luckely I still had the old 100GB disk in a caddy ready to go.
Personally I'm not happy with the resume function on my Dell D610 at the moment.
Aidan