> And polarized sunglass lenses don't do for you? :-)
>
> Really, something that would cut light that's perpendicular to the 
> windshield would be cool. Like the larry niven blue-sun goggles.

It would probably be illegal though.  Most countries have strict 
requirements about the % of light that is transmitted through the front 
windscreen and the front side windows.  AFAIK the specifications are not 
detailed enough to deal with polarised light, but simply adding a polariser 
would likely reduce the transmittance enough to fail the tests.

A further idea is to replace the screen with a LCD panel that has just one 
huge passive pixel (=very cheap to make).  You automatically get polarisers 
that will cut out any glare (assuming you align them correctly) and then you 
just need a light sensor to dim the view when it is very bright - no need 
for sunglasses!

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