Actually, the manual for my XKR (not pictured) says that I should do 10,000 mile oil changes. I believe the Camry manual says the same, though I don't own one. Manufacturers have been going to more and more extended maintenance intervals - some because their tech is good for it, some because the car will probably be traded in before the damage caused will be evident. My friend's Ford Ranger's manual has a similarly bizzare maintenance interval listing.
Me? Oil change every 3K, transmission and diff every 30K, coolant every two years (despite the fact that I'm using 5/100 coolant now).
I think the combination of the frequent trans fluid changes and the heavy-duty cooling system (including a separate radiator for the trans fluid) has really extended the life of the powertrain. It's got 315,000 miles on it, and when I had a compression test done on it last year the mechanic told me he thought his equipment was malfunctioning because he was getting readings that were consistent with a vehicle that had 75,000 miles on it.