For a truly fascinating look at where the idea of a global brain might lead, see some of the work by Herbert Spencer ("Society is an Organism"), Teilhard de Chardin (the noosphere) and Mayer-Kress, Rosnay, Heylighen, Bollen, Goertzel who write about the web as the Global Brain at http://pespmc1.vub.ac.be/GBRAIFAQ.html
And for a fun look at what you may be wearing in just a few years, or who might be doing your computer searching and communicating for you, visit google or your favorite search engine and search on:
Questions, comments? You'll find me in the global brain by following the path to hope.greenberg@uvm.edu or by visiting http://www.uvm.edu/~hag. Come yourself or send your avatar!