I got the idea to put this together after reading an article on TUAW about creating iCal ToDo’s with AppleScript. I remembered that SuperDuper! supports running shell scripts before and after a copy job, so I thought it would be nice to script myself a reminder to clone again in two weeks.
First save this code as a shell script (AnyName.sh)
#!/bin/sh
arch -i386 osascript << EOF
set theSummary to "Backup HDD with SuperDuper!"
set bkpDate to (current date) + 14 * days
tell application "iCal"
make todo at end of events of (item 1 of every calendar) with properties {summary:theSummary, due date:bkpDate}
end tell
EOFMac OS X Hints
http://hints.macworld.com/article.php?story=20100226143539290