https://www.ibm.com/developerworks/community/blogs/InsideSys...
http://www.theregister.co.uk/2011/02/21/ibm_watson_qa_system...
http://learning.acm.org/webinar/lally.cfm
http://www.cs.nmsu.edu/ALP/2011/03/natural-language-processi...
Of course, there's still a big gap between "Download some stuff" and "Build Watson", but at least there's a trickle of details on what happens in the "a miracle happens here" step. :-)