White Macbook: 56 months, 103 cycles. 85% battery.
This machine is semi-retired for business use as a result of my obsession with Macbook Airs, but it still works great as a family machine.
Now my old ibook, 101 months old, and 105 cycles, is on its last legs. Display is fading away and the hard drive sounds like it is about to go. I used to use this old G3 to connect to the LAN at work, but finally stuck it in a desk drawer when more and more software wouldn't work on the machine. Coconut battery shows 96%, but the battery is gone after 50 some minutes.
I think the posts in this thread are quite demonstrative of the capabilities of this basic machine. I've had few other computers that could equal this amount of service.