19th Century MMO?

My wife and I were discussing why there aren't more MMOs based on 'real-life'. She suggested, for example, a game based on the Napoleonic wars. As we discussed it, it became clear that many of the game elements World of Warcraft introduced could work very well for a game based in history (or in the present day). Because time is more or less fixed, you could run things through a little bit at a time (the armies are here, etc.) You could even stage 'events' where the actual battles would take place (since really, the war was a whole lot of maneuvering and very few days of pitched battles).

We also discussed how interesting the social side of a game set in this milieu could be - with a bajillion readers of romance novels and/or period pieces, why not have the game set in the upper class social world of the 19th century. The key statistic, then, would be your reputation, rather than health or stamina (although stamina could be used for, for example, the ballroom or the drinking hall). Levelling would include such traits as promotion within the government. You could grind rep with particularly influential people. Etc. It fits very well using the basic mechanics already well established in other games. And the audience, interestingly, is completely new - which either means great success, or great failure....