Scientific American has an article online from their printed magazine (December 2007 issue):
In the article it is shown that playing video games may eliminate the gender gap in spatial skills. The article details a test of college students who played a World War II video game for 10 hours over several weeks. Women caught up to the guys in spatial-attention tasks and object-rotation tests. The interesting finding is that these gains persisted in tests of the students conducted five months later.
Jump to the article to read the comments of the study’s lead author on what may explain these gains.