That's what I thought at first!
Went out this morning and cleaned the terminals. Funny thing is, everything works with the key turned to ACC. Radio comes on, headlights work... everything. Even the light under the hood was bright enough to be seen at dawn.
Then I try to turn over, I get a hard-click and everything shuts off. Lights, radio, dash...zip.
I'll pick up a new battery today and see if that does any good.