You can also edit wordpress data directly from filemaker by using ESS to connect to the MySQL WordPress database.
There's also plugins and other methods to interact using the WordPress API.
Yes, I have a number of urls for that. However, I am not interested in spending tons of time and money to do this although a business might have a true need.
So, my aha moment lead me to a reasonable alternative.
First I can compose my drafts and then save them to a global. Copy the global. Open Web Direct, create a new post and paste in the text, etc. Kind of a manual two window sync.
My costs: 15 minutes of layout design and a script or two.
Using Plugins or other methods I might spend a few weeks and $1000 cash to implement.