Hey, this is actually a subject I'm very interested in. If you didn't see my post, I'm going to grad. school for neuroscience. Now I don't want to put down anyone's beliefs, but I'll lay down some cool things I've learned.

As far as our brain's being quantum computers, you're pretty close to what our brains are really like. Although we don't calculate things at an atomic level, like a quantum computer, our brains work in a parallel processing manner (with some tasks serial). I mean we have dozens of processes going on at the same time in perfect concert to create the illusion of consciousness. This is a hotly debated topic, but I believe the syncing up of all our incoming sensory information and planning for the future at the same time is what we call consciousness.

One interesting thing about consciousness, that supports my former belief, is that there is no center in the brain to which all information goes to. There is really no start or end in the connections of all the cells in the brain, it makes a kind of neural net.

Each cell can make up to around 8,000 connections. You start with supposedly (no one has really counted) 100 billion neurons at the height of puberty. You can imagine how big the number of potential connections there are in the brain.

Each second (after puberty) you lose an average of 5,000 neurons to automatic cell death processes (to prune unnecessary connections/neurons).

The brain can use up all of its "resources" and be around 100% processing load at least for some specific tasks. For example, try reading and talking about a different subject. Its basically impossible because you only have a limited capacity for your "inner monologue" (I forget what its called).

Can't think of any more at the moment...