I don't, and it would be too expensive even at $15 imo. But even if something like this had a market there's the problem of the editor, as it uses contenteditab

I don't, and it would be too expensive even at $15 imo. But even if something like this had a market there's the problem of the editor, as it uses contenteditable which is at best inconsistent across browser and at worst completely broken. That's also the reason Google Docs dropped it and started doing editing the hard way. As long as you know who uses your software and you can enforce the use of a given browser (as is the case with the writers for the NYT) there's no problem with contenteditable, but for a general solution you need to drop it.