I am a new AAA member and read over the benefits and one of the new benefits they have is the free credit card key. I took my set of car keys into the local AAA office and they made me these plastic keys that are attached to a credit card size frame. Anyhow, it really did take less than a minute for them to make the keys and I had two keys made. One for a Mazda RX8 and another for an Isuzu Trooper. They are unable to make duplicates of squarish keys or the inverted design like Lexus'. Anyhow, both of the plastic keys unlocked doors but the RX8 would not start b/c the original metal key has a security feature in it. So for older cars, it should work fine to unlock and start the car. However, since it's plastic, I think that the key may wear down over time so I wouldn't rely on it as your primary key.
I thought this was a hot deal since it's a fairly new benefit and not well advertised and it's free so it's gotta be hot.
Oh and also, the AAA office I went to (Potrero Center in SF) had automated vending machines for their maps so you can just borrow someone's AAA card if you are not a member and get maps.

