Well I've been waiting since Tropico 1.  Pirate cove doesn't count.

That trailer looks pretty good. I've always liked the first Tropico. I probably wont pre-order, but I'll definately have a look at the reviews for this game to decide I will pick it up.

The fact that it's available on impulse is a big plus.

Viva El Presidente! 

The music was good and there are some interesting aspects of the game.  But as far as the game play goes, that trailer makes it really hard to tell.  I'm going to wait for the reviews first.