So a miniature game that I really like and play (4 armies now) has just done something really cool. They had a major revision to the rules planned for release in 2010 that would revitalize the game, well they just decided to release it all online for free. That includes the full rulebook and all the stat cards online for download at the above link.
Warmachine is a fantasy steampunk game centering around giant steam powered robots called Warjacks that are controlled by special battlemages called Warcasters.
In this day and age, I'm surprised more companies don't do something like this. Sure, you lose book sales, but the money is in the miniatures, and it's a great way to get new players interested if they know they can get the full rules, take their time to read them, then decide if they want to get into the game.