We've seen a rash of failing Wireless Control Module's lately. It's the module that controls security and other features mounted on the key cylinder and it will cause exactly that symptom..
Try This.
Remove the IOD fuse, It's the fuse enclosed in a black or clear holder in the fuse block in the trunk. It wont come all the way out, just squeeze the tabs on the sides and lift it up about 1/4 inch to disengage it. (if you are confused you can find detailed info on the location of the IOD fuse in your owners manual)
Wait about a minute and push the fuse back in.
If the car starts after doing this call your dealer on Monday and tell them you have a bad WCM. They'll know what you mean.
Best of luck !
