Just noticed the Napoleonic Wars addon has been released, £7.99 for UK types like myself. It's "DLC" so you need Warband to play it.
Also, Warband is only £3.74 at the moment, a great price for what is in my opinion a great game.
Also, they've upped the multiplayer server player limit to 200. I think the community had previously got it stable at about 116 players, but taleworlds have done some tinkering I expect.