mk man i found somethin in my book. you wanted an organic way to get rid of them so... whiteflies are atracted to the color yellow. to make a trap similar to a fly trap, take something like construction paper that is bright yellow, cover it in a sticky substance, like "tanglefoot". place the traps on the rims of the pots, when they are full of flies throw them out.
other than that there is a preditor wasp that doesnt sting people, 2 or more per plant will take care of it, but its really slow... theyre called Encarisa Formosa.
but you could use any kind of organic pest controll spray i guess.
also says pyrethrum works great... but not organic.