I haven't seen your code, but if you haven't already done so I highly recommend putting the guts of this into Language.php, so it doesn't clutter up the common code, and so other languages that want such an option can adapt it cleanly.
Good idea, will do.
The user option should also override the sitewide setting in Language::date() ($wgAmericanDates true or false -- incidentally, although there were terrible flame wars a few months ago when it was suggested to change the date format used to display timestamps from American to British order, I've not heard a peep since the default got flipped during the server upgrade over a month ago.)
Okay. I was wondering what that option did.
I'll see about setting up a login for you. (Erik probably should get one, too.)
Thanks.