Most of the subtropical/tropical dews I keep (outside of the pygmies) have never gone through a noticeable dormancy phase. I've found species like D. adelae, D. capensis, D. spatulata etc. to be the most forgiving and easy to take care of, but I do agree that they need more intense and possibly more consistent light than a northern window. Humidity depends on your ambient conditions (I prefer 40% at least). D. adelae is known for being okay in dimmer light and cooler temps too.
Like stated California Carnivores is a great site.
I have a venus flytrap, nepenthes and another pitcher growing on a south facing window sill. The fly trap and pitcher sit in a container of Distilled Water. Very important. The Nepenthes is watered everyday with distilled also.
Flytrap and pitcher are both put in the refrigerator for about three months, Dec, Jan, Feb and than are re-potted.