ADDED Jezebel comments:
The Times posits that her legacy is apparent in Obama's "self-assurance and drive, his boundary bridging, even his apparent comfort with strong women." I think her legacy has other ramifications as well. If Barack wins the presidency, the specter of Stanley Ann could put the nail in the coffin on the right-wing love affair with the "nuclear family." It's obvious that in this country, and in much of the world, the shiny, suburban two-parent household is mostly a Dick Van Dyke-ian fantasy. If a boundary breaking, unapologetic single mother could raise a son who becomes President, the notion that being raised in a traditional household is ideal would take a real hit.
On the other hand, Obama seems to have embraced all that his mother eschewed: he married into a tightly knit, Christian family. He's never moved his kids around -- he and Michelle have (smartly) created a very stable world for their daughters, Malia and Natasha.