Holy cow, this thread just saved my bacon! I'm from Dallas TX... but I'm in Pittsburgh, PA with my XFire but with no spare key (it's in the apartment in Dallas). I had this EXACT problem when I got up this morning!

I was completely panicked, as was my fiancee, as we are scraping and saving every single penny for our wedding and can scarcely afford to drop a few benjies on a stealership trip.

Fortunately for me, there's something wrong with my alarm speaker, so the excruciating noise for the original poster was a mere cricket's chirp for me. I'll have to get that fixed at some point, but it sure was nice to not have an ear-splitting alarm going off in the middle of my apartment's parking garage at 12:30 in the morning...

Anyway, I disconnected the battery, waited for the alarm to stop, and then hooked it back up, and lo and behold my fob worked again and the car turned right over!

I'm going to go ahead and replace my battery as soon as I can, as it's an 18 month battery according to the label and the car is an '05 that I've had for almost a year! I can't believe the dealer let it sit on a lot or in storage that long without swapping the battery, but this one appears to be the original.