I hear that the Wilcock material can be as daunting as it is essential. Fortunately for all of us Jan Wicherink has written a book where he summarizes all this material. And even more fortunate is that he kindly has placed the whole book online for free at the url below. Both in PDF and HTML form...
I can highly recommend it. If you want to understand what 2012 is about why it is happening and what the underlying physics is about... Point your browsers at :
http://www.soulsofdistortion.nl/SODA_toc.html
The man did a good job