(Ref: Good Morning Silicon Valley's First Edition newsletter; highly recommended.)
Of course there are issues with selling to minors (and a whole side discussion on the efficacy of that law…), but these are things that can be dealt with - we should be able to have wine shipped home. (After all, we can drive over a border, buy it and transport it easily enough. Not so easy if it's across the continent though...
I can see how various industries and agencies have stakes - both ways though; I'm sure California (and other exporters) want these old laws brought up to date.
FWIW, In Vermont, it actually is apparently possible to get a temporary license, but it's unclear what you could actually do with it. Here's a good article from wine.about.com: Current US Wine Shipping Laws: Vermont.