I don't want to commit to a user interface for this at this point, so you have to be familiar with adding scripts to Fargo's menubar to make this work.
To add a command to the menubar, follow these instructions.
The command should just call this JS function: viewInMyword ()
Create a blog post in Fargo as you normally would.
Put the cursor on the main head.
Choose the command you added above.
Click on OK to view it in myword.io.
myword.io should come to the front, displaying your post.
Add an img attribute on main headline to replace the Beatles image.
Add a description att on the main headline, to add a description.
If you aren't using Markdown, add an att named flMarkdown set false.