I had my iPhone since July 06. It had a problem with the speaker volume going up and down all on it's own. One minute, I could hear a song or make a phone call and hear perfectly from the speaker, I could even hear it ring. 10 minutes later, the sound would be so low I couldn't hear a thing.
Now after 6 months, I decided to bring it to the Apple store. I made an appointment for 4PM and got called a few minutes before. I had my second iPhone with me to compare side by side sounds, identical setup with ringtones and all. He heard the difference right away and I walked out with a brand new week 1 iPhone.
Syncing this to my old iPhones contents was a problem. Because the old iPhones backup was on 1.1.3 and my new iPhone is on 1.1.2, the backups are not compatible so I could not use the backup. I could easily upgrade to 1.1.3 and use the backup but I don't think I want to on this phone right away, I can jailbreak it if I want.
I did walk out with an iSkin Revo case just like what I have on my other iPhone and an airport extreme base station. A person can't go to the Apple store without walking out with some new toys.
Anyways, my point of this whole post is to praise those most excellent people at the Apple store. Where else can I walk out with a brand new iPhone after owning the old one for 6 months. Good service, Apple RULES!