This! Offering data export functionality (API or otherwise) is what allows data portability nuts like me to use things like Read It later/Evernote/whatever without cringing a bit in fear of losing the data for any number of reasons. The probability of needing it doesn't factor into my gut feelings, just the (miniscule?) risk of it. ;o) Have already started using your app though, it looks very nice!

That's a good idea. I'm going to add that to the road map.