I'm surprised he didn't mention the iPhone Notes application as a great example of the principles he's talking about: besides autosave and getting rid of the filing friction it also eliminates the friction of naming.

For me a huge part of the hassle with saving documents is naming them. When I'm in note-jotting mode it's usually low level, so to have to step back and try to quickly come up with a title that covers everything I've not yet written is frustrating because I'm not in an overview mindset and there's nothing yet to summarize. Add on to that the administrative work of filing, and saving text documents becomes something I put off for as long as possible.

I've tried Notational Velocity, but it has the same problem of forcing you to create a title separate from the content. (It also lacks creation dates, which are I find valuable for putting notes into context.)