I also saw WW1G in a list of five strategy games for history geeks(dunno what geek means):
Game: World War One
Genre: Grand Strategy
Time Period: 1914 -1918 (The Great War)
Appeals To: Hugely detail oriented wargamers who want to mastermind the WW1 conflict
Despite being panned for it's difficult interface and lack of user guidance for it's complex gameplay, developer AGEOD has clearly put a lot of thought (and research) into how to make a WW1 game as detailed and realistic as possible.
So, there's a two 'grand campaigns', which comprise the main part of WW1 and cover the bulk of the conflict, one has 4 sides, the other has two. There's also four shorter scenarios which encompass smaller, more specific aspects of the Great War (such as the war in Prussia, or Serbia). At the beginning of the game you pick a 'war plan' which affect your initial strategies and provide certain bonuses to your nation.
Each 'turn' lasts a month or so and has several phases, the most important one probably being the military phase, where you organise, move and direct your armies in combat. Combat here is a bit more than 'point and click', you assign the multiple units that make up each each 'stack' to specific roles, such as near backup, frontline deployment, or reserve.
Another interesting aspect that shakes up the game is the addition of random events, such as assassinations and so on. There's also a diplomacy system that is a little different and more complex than a lot of it's competitors (for example, your ambassadors do much of the negotiation and political decision making for you, coming up with their own treaties).
Just like OP, although i have this game for a long time i still haven't played it seriously, but tonight i decided to continue my game that i started long time ago. Also i guess this year in school we will be learning WW1 in history class, hope i can show this game to some people.