The app that played a large part in building this site is now available for the iPhone. For the launch, they marked it down 50%.
Not only did I write code in the iPad app, I have also used it as my non-Dropbox1 Markdown editor (use case: when I write HTML emails in Markdown).
Now you can have it on your iPhone for those super-desperate situations.
The app does sync to Dropbox (well, I might add), I just choose not to. ↩