I know the developers said it is not quite possible to create multiplayer since it requires a rewrite on nearly the whole script, I think it's worth developing so.
I am sure lots of people are stepping aside from purchasing Don't Starve because it's only a singleplayer game. The game is really half-worthy if it's only singleplayer, especially sandbox survival games like Don't Starve. Personally, I don't mind a prospone on a few updates just to spare time for the developers to work on multiplayer (even LAN is developed, it's already more than enough).
Hope the developers would take a look on my opinion.