King Arthur's Gold: Free Alternative to Terraria?

Just spotted this online; a small freeware game in the Terraria vein, but as a class-based, team-objective competition. In King Arthur's Gold there is no crafting, but there is mining and combat with gold being the way to victory. Each character type has it's role and teamwork is the only way to success. It is constantly being updated with player suggestions and complaints driving the development forward. You can keep tabs via the forums, Wiki, RSS feed and even a Get Satisfaction page. Nothing to dislike here other than there being no easy way to provide the devs with some beer and pizza money to keep them going.