According to the Kickstarter page, Greed Monger is being developed for both PC and Mac. Other features include non-instanced housing, no global chat, a player-driven economy, no predefined skill trees, community events, and animals that only drop crafting materials. On top of that, every finished item that exists in game is player-crafted. The game will be free-to-play, with the team's future development funds coming from purchases of land parcels, not cash shop micro-transactions.
Check out a basic demo video after the cut. For more details, as well as screenshots depicting housing and a video showing off a castle that the highest contributors can acquire, check out the game's campaign page.
[Thanks to Bryan for the tip!]