Hi!
I prepared a little script that allows to publish OmniFocus tasks as highlights in RescueTime. Check it out in this gist: https://gist.github.com/kholodilov/f2c796fa184cd835bc4f
I described how to install and use it in the blog post: http://kholodilov.postach.io/post/publish-omnifocus-tasks-as-highlights-in-rescuetime
Hope it’ll be useful for someone else :)
Dmitry