I am using a modified version of this guy's AppleScript...
http://www.leancrew.com/all-this/200...and-omnifocus/
His script is a modification of the OmniFocus built-in "Send to OmniFocus" mail action. However, it doesn't work as posted, because the format of the Jott email has changed since the article was written.
Nevertheless, I followed his set up... I created "Focus" as a Jott contact, and then modified his AppleScript to extract the Action from the first line of the Jott email.