HP's new line of ads, reviewed here by Seth Stevenson of Slate, are pretty spiffy. Great graphics, neat concept-- but, as Seth points out at the end of his review, and I was already there midway through; there are no women spokespeople for the brand. Plenty of interesting and varied male celebrities are shown discussing their HP notebooks. Not a gal among them.
If women make up 57% of current college students (and that figure is rising), and if college students are one of the most prolific computing groups, it'd make a hell of a lot of sense to market to them.