Time for a refresher on WP, bird. It's pure html in the mysql database.

One record per version of the text. I'm pretty intimately familiar with it.

eb.tbicl.org just for playing around. 

And I'm not particularly interested in writing yet another wp editor 

interface since they already have a wide selection available. One

example is a free one from Microsoft named Windows Live Writer 

(not my preference, btw.)

This argument isn't going to be settled until someone comes up

with a means to measure and compare their effectiveness in

addressing the four main requirements - 1. User productivity

(e.g. pages published per user hour,)  2. Accuracy (perhaps

curve-fitting of errors per incremental page-task,) 3. Immediacy

of user feedback (maybe using parallel proofers) with positive

rather than negative reinforcement), and 4.) a positive,

comfortable proofing experience (say, like reading a book)

that retains users.

Considering the only currently available option features no

measurements, and the only feedback is too stale to be

useful, and then only negative, my opinion is we have a long

way to go yet.