I did about 40 miles today trying various suggestions posted here and elsewhere. I felt a bit better on the whoops - simply started getting a bit more agressive - would occasionally jump one or two at a time - found it a bit tiring that way, then worked on keeping the front end up and basically wheelieing through, then simply staying on the throttle more trying to keep the front end light, but not necessarily wheeliing. Found I would lapse back and forth between the three depending on the situation and felt much faster and smoother, and burned much less energy. In a bit longer section of whoops I would start out jumping if they were deep and big enough, do that two or three times, then the wheelie thing, then simply staying "on top" of the whoops keeping the front light, and staying on the throttle a bit more. I found not gripping the bike best, weight generally centered, or to the rear.
One time i obviously had to much weight to the rear, right when the ole KTM really hooked up - front end skyward - I was stylin! did that section of whoops in great fashion - would of looked great on film - but was a bit to close to "the edge" for my taste!
the biggest trouble i had really was when my timing would be off particularily when trying to jump the whoops - a couple times slammed into the next whoop with the front end - thats when having the weight to the rear was helpful!
Keep the suggestions comiing!
Oh - btw - TexKDX's comment re leaving the throttle on - even while braking, etc is right on the money - its a techinique i first picked up on a street bike during a road race class I took - the idea is to come into the turn on the brakes, but not totally off the throttle and start rolling on the throttle before the brakes are released - dramatically smooths out that transition between brake and throttle allowing you to brake harder and deeper into the corner and accelerate out sooner and harder on the way out. seems to work the same way in the dirt.