YES LAN ! ! ! !
Now is just the waiting game for EE to come to gog.
Is it really a proper LAN play option? as in "no internet connection needed"? I ask because there are many games claiming to allow for LAN play but you still need to authenticate beforehand, so you still need an internet connection.
Yes. I'm very cautious about this matter, too, so I made sure.
Here's how it works in NWN:EE.
There are three safeguards to ensure you're playing a legit copy of the game, but none of them is any form of intrusive DRM. Here they are:
1) Built-in CD-key validity check - this is done by the game itself. The CD-key you use is checked on game launch to see if it's legit (note: legit, not necessarily legal). Again, this is done by the game itself, no connection to the Internet is needed. The game only checks if your CD-key might be valid. In other words, if you use a random string of characters as your CD-key, you won't be able to play - but if you use your legal NWN:EE CD-key (or anyone else's, or one generated by a keygen) you'll pass this test and be able to play single-player. This safeguard is the same as it was (and still is in NWN:DE on GOG) in the original NWN.
2) Unique CD-key per game server - this is pretty self-explanatory, no two players with the same CD-key are permitted to play on the same server at the same time. If you try to join a server on which there's already somebody logged in who uses your CD-key, you'll get a message informing you about it. This applies whether you play on LAN or over the Internet. Again, this is the same as it was in NWN:DE.
3) CD-key authentication by Beamdog's master server - this one is a bit more tricky and may at first glance look like intrusive DRM. Whenever you try to join a multiplayer game (be it LAN or otherwise), the game connects to the Beamdog's master server in order to verify that your CD-key is not only legit (which is what test numer 1 checked), but whether it's actually legal - whether it came with someone's purchased game copy. If the server does not recognize your CD-key as a bought one (for example, if it was generated by a keygen), you won't be able to connect.
What makes it NOT intrusive is the fact that if the game can't connect to the Beamdog's master server (which happens if either it's down temporarily or permanently or if you have no Internet connection), the whole authorization process is skipped.
Again, it worked similarly in NWN:DE, though there are a few differences making it more difficult to play multiplayer over the Internet on a cracked copy of the game (until the Beamdog server shuts down, of course). I'm not going to write more on the topic, because the only people who'd benefit from this information is pirates.
All that honest NWN:EE players (and prospective players) need to know is that if they buy the game, they'll be able to play both single and multiplayer forever, even if Beamdog shuts down their master server. ;)