Car won't start

[Mike The Canadian]

So,

I'm finally home for the first time in months...
Drove the car this morning, it was fine.. my folks drove it this afternoon to work and it no longer starts; no symptoms during the drive...

The facts:
- It will fire, rise to 1500 rpm and die (no matter if you open the throttle or not)
- Gas gauge shows 0; was just below half prior to shut down
- Radio does not work
- No theft light on
- Lights/Windows/Etc. all work
- HVAC works
- Fuel pump primes
- My aeroforce gauge no longer reads from the OBD2; simply lights up and stays that way, I'll try a conventional OBD2 scanner tomorrow..

So far through discussions with others I'm going to start this way:
- Check all fuses
- Check grounds
- Test alternator
- Shoot myself because electrical problems suck

2001 Malibu 3100 V6

Thoughts?