I delivered a quick session last week at TechEd Brazil 2011.
During the presentation I promissed to publish a link for the participants get access to a PowerShell's Daily Operations script for Exchange 2007/2010.
As you know Microsoft does not provide support for scripts so any change or something is up to you.
I hope you enjoy the script. It's zipped in the attached file DailyReport.zip. You just need make some changes inside of the script as SMTP Relay server's name, Email addresses, and update Server's list file to reflect yours Exchange's environment.