Based on cpw's Iron Chests mod, this mod for Minecraft adds a few different tiers to the already existing block known as the furnace. This version includes Iron, Gold, Diamond, and Obsidian furnaces, with each their own burn speeds for cooking items.
Go ahead and submit pull requests if you want to help with the project! You can also use issues to report bugs which will be looked over and hopefully patched!
Go for it! Although I hope to be notified that it is being used!
See above.