Previously, if you attempted to email or download a document that hadn't been saved yet, you would get an unhelpful error message. Now you get a helpful message that asks you to save your document before performing one of those actions.
I also added some links to the homepage - a Twitter link that will allow you to share the application with your followers on Twitter, and a link to this here blog.
I'm intentionally adding only "essential" features to the app, so that things remain uncluttered and you can focus on your writing. However, if there's an essential feature that you feel I've missed, please feel free to send me a feature suggestion.