Marketing A Browser Based Game

So as I roll this new game out, battleforcesonline.com. I wanted to advertise it and try to drive some users to the game. After some research and head scratching below is my plan. I'll write an update in a few days about how it's working.

Referral Program
The number one item that I put into place to help with marketing is the ability to refer a friend. If you refer a friend and that friend plays the game a bit, you can get a free unit (game piece). I'll be interested in seeing if this helps with word of mouth.

Forum Postings
I feel like such a heel. I've gone to about 10 different forums and posting a request for beta users for the game. I felt like a spammer. In my defense I tried to post only in those threads designated for new games or advertisements.

To be honest I don't expect a lot of traffic from these posts.

Gaming Directories
I've posted the game to a number of gaming directories, it will be interesting to see which ones will prove to send the most traffic.

Stats
I should point out that I am using Google Analytics for my stats tracking.