Are there statistics that indicate the situation is improving? I'm not in Cali anymore but have Asian american male friends who like Caucasian women that would be interested in this.
Without being too cynical, I attribute this to a natural outgrowth of the economic success of AMs, the rising tides in Asia, and more and more AMs appearing in media. (e.g. Daniel Dae Kim in Lost) Let's be honest, men's romantic liberty in choosing mates is often proportional to economic success.
It all started with Russell Wong and the Noxema Girl in "Vanishing Son" :)
Possibly the kindest way I've ever seen that phrased.