http://www.toqc.com - The Temple of Quantum Computing, a free downloadable e-book from dec 2004 by Riley Perry. Targeting people with no past experience with the subject. The Temple of Quantum Computing, have been updated 2006-04-29 to v1.1 free for download as usual from the toqc website.
< GroovyJ> Apparently, a screwup in a quantum computing experiment has shown that entangling photons doesn't actualy require that the photons exist - you can entangle empty space just as well.