Hey...that happened to me last night too. After work, I went to start my car and the lights and everything worked but not quite enough juice to crank the engine. I ended up getting somebody to help my push my car UPHILL out of the parking space and I started it by having the my Fiero roll the the hill.
When I got home, I let it idle in the driveway for about 20 minutes. THis morning there was enough juice to start the car.
Not bad, considering I've had this delco battery in my Fiero for about 11 years now.
.....so I share your pain...