the internet is a brain. or vice versa?

The more I interact with the twitter world, the more I realize that the connections that shape the internet are undeniably similar to the neurons that form the brain. There are about 400 million internet users today (http://www.internetworldstats.com/stats.htm). Thats a lot of people connected via wires and electricity. But wait - how many neurons are there in a SINGLE brain? Well, there are about 100 BILLION per brain. This number absolutely trumps the number of internet users in the world, but there are key similarities to understand here.

The internet is made of computers connected together, exchanging information via electrical signals. The same is true for our brain. A neuron communicates with another neuron by sending electrical impulses down its axons (like a wire & plug) to another neuron's dentrites (like a socket). Unlike the computer, which sends information in code that contains diverse types of information, the neuron sends information by changing its frequency in transmission. For instance: if I were to hit my hand on the desk with little force, neurons would fire signals at a constant intensity - with relatively low frequency. Comparatively, if I were to hit my hand with a sledgehammer, then my neurons would fire signals with the same intensity - but with a very high frequency. Anyways, thats besides the point. The bottom line is that the brain sends electrical signals throughout its network of neurons much like the internet sends information through its network of computers.

How did our brains evolve? How did the internet evolve? What will the internet look like in the future? Our brain size is limited by our skull size - is there an upper limit for the internet? We have IQ scores for our minds - is there an IQ for the internet? Is Klout score analogous to IQ? Probably not, but I figure Id mention it anyway. Just for fun.