Geothermal Energy

To me, this is one of great mysteries of sustainable energy: why is nobody talking about geothermal energy? We hear about solar, wind, cool new nuke plants, wave, etc. and that's all fine, but what about geothermal? To me the potential is huge, it is scalable, it is safe, and the issues and concerns with it are less than say nuclear. Here are a couple of interesting sources.

• Geothermal energy is poised for a big breakout (great piece on Vox)
• Eavor (let's make money with geothermal!)