Honestly, the more I think about this, the more I think that we'll have an English-to-English translating algorithm as soon as we have a "classical-masterpiece"-writing algorithm or a "painting-so-beautiful-it-makes-you-cry"-creating algorithm; that is, probably never. I'm no expert writer, but I know a few, and it seems to me that excellent writing style is more than reading Strunk & White cover-to-cover while reciting mnemonics for choosing between "who" and "whom." It's also knowing when to break or bend the rules, how to break or bend the rules, and why to break or bend the rules. That's the kind of spontaneous creativity that I don't think computers are even close to emulating, much less learning.