I'm a fan of Penultimate's file system, which allows you to choose between the same style as OO, Pages, etc. or a more grid-like view (
http://www.flickr.com/photos/poritsky/5716025558/). I really like this grid view, because even though you won't be able to see as many documents as with a list view, you can still make out the basic design of each document. 6 full docs are visible on one page, with 2 more obscured at the bottom.
That's way better than one document. Plus, you can quickly scroll and organize either by name or modify date. In Penultimate, you have to click a "notebook" twice to open it: once to select it, making available for export/delete, and once to actually open it. This changes the user experience compared to OO's one doc active at a time scheme, but it could be a nice trade off.
