For those of you wondering what it is I do, check out this article in the New York Times science section. It's a good overview of Toxoplasma gondii, the parasite I work with, and as an added bonus, my advisor is quoted in the fourth paragraph.
Of course, they neglect to note that our French collaborators were the first ones to determine that T. gondii was transported from the intestine within dendritic cells, but that is not important to your understanding of the organism.