When I create my multyplayer account they ask me for my "Internet Game Key", where am I supposed to get it?

Same here. :(

+1. No info anywhere about Internet Game Key..

I'm also wondering where to find this key. :S

hot seat didnt work to

The Hotseat Button isn't working too by the way. Is it possible that not every feature is implemented yet?

OOOOOKAYYY? Wondering why they didn't say that before on an official way. Now I see a lot of people wondering why the multiplayer functions are not working, googeling around for that "issue" or contacting the support. :S

They DID! In stream on russian language.
I mentioned it http://www.gog.com/forum/eador_series/soo_much_for_preordering_read_this/post35
Bolded part. Nobody noticed, probably.

Practically, they did it exactly like that:
http://www.nerfnow.com/comic/919
Postponing in 2012 to add multiplayer on shard, which before release became "tedious and boring" (cite from stream)

Stream in russian laguage and a post in a forumthread where about 99% of all buyers didn't notice? That's like findig a needle in an haystack. You could also write a message on a sheet of paper, hang it up somewhere in New York and hope that everyone reads this message. Also a lot of people who bought that game on Steam are confused, as I saw in the Steam forums. :S

Wasn't it the same thing with the game The War Z. The developers advertised features which were missing on release. A lot of buyers complained and the game has been taken out of the Steam Shop although they promised afterwards to add these features in future updates? Steam observed the further development and only put the game back online when they were confident of the product. Perhaps all because of lacking informations about the game.

It should have been the first priority to finish the maingame before making an expansion in form of a DLC for russian preorderers.

Now I see they posted serial number at game page (My serial number). But still, tried to activate it and no success.. Maybe someone from devs can explain why it's like this. It's better to say than to hold the actual reasons of all this stuff..

where I can find my Key? thx.

ok i found the key thx