Bombard - I don't want to be seen as plugging anyone, but Danny Sullivan's place in Sky Park Circle is a great place to start (
www.ockickboxing.com), and his Kali-Silat classes work extensive edged weapons drills.
I will gladly yield to CCWI and others on releative "deadliness" of knives vs. firearms. A trained knife-fighter with the proper mindset is very difficult to deal with, as our own military found out in the Philippines during the Huk rebellion.