I just finished watching all three episodes of the first Dune miniseries, and am about to start watching Children of Dune (taped by my Tivo). I think my head's going to explode..
One thing I noticed is that in Dune, the scenes where they show the Harkonnens plotting take an important visual cue from the original Batman TV series: Always show the bad guys in odd camera angles and sinister red light, as it makes them look more evil.
Here's to hoping Children of Dune improves a bit on this..