As I get into more material on high frequency training, I've started to really become interested in undulating periodization. For those of you unaware, this basically means that you change the focus of your training on each lift from session to session. So you may go hypertrophy then power then strength thoughout one microcycle. It lends itself really well to high-frequency training and in some respects, I've been unconsciously modeling my training (particularly my bench training) after a DUP style. Smolov is an example of undulating periodization in which the reps, sets, and intensity changes each day during the microcycle. UP can then be patterned in a linear or block fashion.
So, I'm wanting to get some good discussion going here about DUP, as it seems like a training style that I could definitely make good use of and I know we have a few people in here a lot more knowledgeable than I on the subject.