I've been occasionally using Workflowy simply because Fargo does not have a native iOS app, and its web app is barely serviceable: I need to close most tabs to increase responsiveness, and even with the arrow pad, writing and editing on the iPad or iPhone in Fargo is frustrating. Only Workflowy has an iOS app, and it works well.
Publish a blog.
Add attributes other than _note.
In Fargo, I can share the public Dropbox URL of an outline, and a reader can import that into Fargo or view it in something like Small Picture Reader.
In Workflowy, I can share any outline via a secret link, and even make it editable.
Both have pretty good keyboard shortcuts.
I can copy the full text from an OPML file in my Dropbox account (where Fargo stores outlines) and paste it into Workflowy, and Workflowy will respect the hierarchy (although not import unsupported attributes). I can also export any outline in Workflow as OPML.
op.insertOpml (data, down);
Just paste the OPML from Workflowy into the dialog box, hit Enter, and the outline will import into your current tab in Fargo.
You can also just import plain text into Fargo, because the app recognizes hard tabs as child nodes.