I too have an iMac G4 800 mhz, after only about 1 month the harddrive started making quite a loud spinning noise so I got it replaced under warranty. Since then though it has been faultless, I used it about 20 hours per week for 3.75 years. Then I bought my MacBook Pro Intel Core Duo, it hasn't let me down once. I gave it a RAM and hardrive upgrade since.
However, a week ago exactly I was really tired in the early hours of the morning and left my MBP (which was in a wetsuit case) on my car's roof while I was driving. It didn't fall off untill I did quite a sharp fast right turn at about 50 KMPH. The computer flung off my car onto a main road, I didn't know I had left it on my car until I got home (a 45 minute drive.) So I had to drive back only to find it hadn't been driven over, fhew, but it was warped and half the screen was kaput. But it still booted up! I can still use it, but only through the half screen So I can't really say it is dead, just need intensive care.
I can posted a picture for guys when I am next on my old iMac (on my girl friend's Compaq Presario notebook at the moment) if you want. Might upload a video to YouTube as well to prove how durable the MacBook Pro is (even before the uni body.)