When key is turned nothing happens?

Hello,
I am in need of some serious expert troubleshooting on my car issue. I have an 2003 Olds Alero, 2.2 4 cyl car with 106,000 miles. Just out of warranty. About a month ago I started having this strange starting issue. I would hop in my car to take off and turn the key to the "on" position, everything would come on. Lights, radio, interior dash and lights. Everything. When I would turn the key to the start position NOTHING. The engine wouldn't even try to start. It was like there wasn't even an engine in the car!
It spent the last 5 days at the dealership. Not in warranty mind you. They could not get it to fail so they couldn't give me a 100% guarantee on what the issue was. I wasn't about to dish out 550 bucks on a Body Control Module if they couldn't tell me what the actual problem was. So I went and picked it up last night, drove it home, started it through the evening last night with no issues. Hoped in the morning to go to work and BAMM! Nothing again. Engine is not responding to the start command.
I have read all over the place that people are having an issue with the security system in the Aleros, this is NOT my issue. No security lights come on, also the car wont crank like described in the security issues. My car doesn't do a darn thing!
The dealership was angry that I took my car back and told me that it could be the Body Control Module or the Ignition Switch. Can someone PLEASE help me understand what the symptoms are supposed to be if the ignition switch or the BCM starts to fail? Are my symptoms similar? I really need this car fixed ASAP!

Thanks for all your help Car Dudes!
Jake