Apple’s Address Book is a great contact manager that comes with every Mac. So when I made the ’switch’ I easily imported my Outlook contacts using the vCard format. However the ‘notes’ section of all my contacts looked like this:

So I wrote one of the simplest Address Book AppleScripts ever. Check it out:
tell application "Address Book" set peopleCount to (count every person) repeat with i from 1 to peopleCount set note of person i to "" end repeat end tell
This site got me started on the script:
http://paulschreiber.com/blog/2007/02/13/address-book-applescript-example/