Scienceblogs.com has an interesting article about the 10 distinct differences between human brains and computers. It gives you an appreciation of the differences and also gives good cause to drop the old adage that 'a computer CPU is like a brain'.

A bonus is added at the end which I felt compelled to mirror below.

The brain is much, much bigger than any [current] computer.
Accurate biological models of the brain would have to include some 225,000,000,000,000,000 (225 million billion) interactions between cell types, neurotransmitters, neuromodulators, axonal branches and dendritic spines, and that doesn't include the influences of dendritic geometry, or the approximately 1 trillion glial cells which may or may not be important for neural information processing.

Got to the artcicle now.