Frank,
The gist of Behe's argument lies in therm "irreducible complexity". Essentially what he tried to do was look at the fact that by means of evolution things evolved from the simplest possible organisms to what we perceive as our living world today. Then he started to point out what he called irreducibly complex systems. In so doing he is trying to show that if an "end result" as we now know it cannot be reduced back to simple organisms then this would argue for a designer/creator.
He does a pretty good job at arguing his point - raises some interesting theories and brings a fresh perspective. However, some have written articles to debunk his arguments.
Here are some links for you to research:
http://www.talkorigins.org/faqs/behe/review.html
http://udel.edu/~mcdonald/mousetrap.html
http://www.talkorigins.org/faqs/behe.html
http://americanscientist.org/bookshelf/Leads97/Darwin97-09.html
http://www.millerandlevine.com/km/evol/DI/clot/Clotting.html (interesting thoughts from Ken Miller in his book "Finding Darwin's God") Do a search on Kenneth Miller..his work is very interesting. Here is the final chapter from the Miller's book you might enjoy it Frank: http://www.brown.edu/Administration/Brown_Alumni_Magazine/00/11-99/features/darwin.html