I am going to miss this mod SOOO much. I love this thing, and the new World Generation setup in 1.7.2 would really be improved with your Mod in place.
I don't suppose you could reconsider making just ONE more version for 1.7.2? Because it really is the first change in world generation in such a long time. Major change, and I'd love to have your mod working with it.
Okay, I have finally finished (at long last). I have been busy for a LONG time through winter, but here is the link! There is a config file to adjust rareness.
The new spawn rates have been implemented, and they spawn in all biomes. The new materials are now added! Tell me how you like the materials. I am open to suggestions; this is still a work in progress.