I was trying to get out of gmail email and came accross skiff.com. The point being, skiff made it easy to transition out of gmail by having a load feature that tapped into the gmails and migrated them over to skiff. This could be a good feature for you guys to use, something similar, where people can get their documents over from the likes of eg. google docs, OR any other document writer for that matter eg. evernote (which is pretty much dead) to migrate people over from EN