Any idea when LAN play will be availabe?

This was one of the key promises (for me) made in the kickstarter. Almost everything else promised is already implemented, including the stretch goals. I'm happy that more features are steadily coming, but the one thing that I am most interested in is still not available yet...

Any idea when will LAN play be possible? Or, in other words, when the server will be released?

Release day is the most likely date.

not until the game is finally released. This prevents cheats and piracy. Until game is actually released it will be online only till that day.

It'll be available at 1.0 release.

As a guess that can be entirely wrong, I would tell you October of this year.

That way, you have a date to wait for, because some people can't sit it out a month at a time.

Anyway, I have faith it is close, there is always the chance they release some things for the modding community early, who knows, but basically it isn't right now because this early game can be pirated before its even released and being serverside helps devs track bugs. When bugs and sales aren't the things the game is working out, they should have no problem releasing server and moving on to mod-support and account-perks.