Wrap text in list view.
Using list view in a narrow window, like on a mobile display, truncates the posts subject lines. Mobile is my main use case where this matters, but you can reproduce it with a desktop browser just by resizing it to be too skinny to display the whole thing. On my phone in portrait mode, list view in unusable because most of the subject lines are too truncated to understand what they're about. While the full view works, it makes scrolling through busy feeds take too long, especially since it includes images.
In other words, make it like the Google Reader mobile view. :-)