The current issue of Popular Mechanics mentioned the prospect of using He-3 for powering commercial fusion reactors (and also of mining the moon for it). I did some web searches and found mostly pie-in-the-sky articles from pro space-exploration sites about how all the world's problems will be solved with He-3. Most of these sites implied that the technology exists to for commercial He-3 fusion reactors, but the big bad oil companies don't want us to know... There were also some web sites I found that talked about how it may never be a viable source of energy because D-D fusion holds more promise than D-He3. One site even "proved" that electrostatic confinement can never produce energy at the breakeven level without violating the 2nd law of thermodynamics.

Here are a couple of questions:
1) What is the current state of He3 fusion? How close are we to breakeven ?

2) Are there terrestrial sources of He3? Tritium decays into He3 with a half-life of 12 years. How much tritium do we produce/have today? Would mining the trace amounts of He3 found on Earth be cheaper than a moon mining program?