These are the kind of preconceptions that are causing us problems. Naked War doesn't require a lot of time or commitment (that's the whole point of the game) but unfortunately people already seem to have strong ideas about the genre.
What I meant as commitment is commitment to other players (like being forced to send a turn each day, or to be connected at certain hours). However, I take your point about the strong beliefs: being a head to head game and not played between many people at once commitment isn't a real issue.
Anyway, online multiplayer and hotseat are a must today... in the past PBEM born due to the lack of a cheap connection, and while it is a good addition to me it became more like an optional to everyone else (it is hard to find turn based games which still support PBEM today). When possible, users prefer online multiplayer for the chat too.
Also, I love to play such games in single player, though I understand it can be a real burden to write the AI.