I've just lost the keys to my 2006 Honda Accord (both the key I normally use and my spare key). Now what?

I flew into my home airport this evening, only to discover that I couldn’t find my car keys. My car is still sitting in the airport lot, and I had to rent a car to drive home. What should I do now? Will I have to get the damn thing towed to a dealer, or is there a simpler way to get a replacement? ARRGHH!!!