The America's Army team have announced that their free shooter has hit 8 million registered users:

America's Army registered players have logged over 3 billion player rounds and nearly 200 million player hours. Over 1,100 fan sites have registered to be listed on the game community website. From the United States to New Zealand, Greenland to Singapore, Latvia to Chile, 38 different countries around the world host almost 1,200 Honor servers. These honor servers track honor points that form the basis of America's Army unique scoring and rewards system.

If you haven't checked it out yet, grab the massive 2.8gb download locally from AusGamers and fire it up. It's a little more hardcore than your average Counter-Strike clone and offers an interesting gameplay experience - and it's free.