Forums on the New York Times
Each node is a blog or section of the New York Times. Size of a node indicates how many comments it gets; color of a node indicates how male-dominated its comments are (red being more female, blue being more male). Two nodes are connected if they share readership*. Give the nodes a few seconds to settle, then check out the female pentagram! (Parenting + Well + New Old Age + Times Magazine + Booming).
*With a little bit of magic so the graph doesn't get too dense or too sparse.