Just dropped in for brief time cuz I knew summa you would love this..
Believe me... if they design this right, will work exactly as promised..
The Kit That Turns Any Car Into A Hybrid | This Could Be Big - Yahoo! News

I wouldnt say it would make a lot of difference on a blazer.. weight/hp, remember ...but it would be a fun thing to mess with.
Better, can move it from vehicle to vehicle fairly easy.

 

$3000 is their target cost they're looking for. That's pretty damn good!
50 - 100% increase in mileage. But that's on a Honda that's 1/2 the weight or less than our blazers. Not to mention the wheel size, rolling resistance, air resistance etc etc.
But for $3000 if a blazer owner could get say a 25% increase, that's still half decent. It would be akin to getting 4 gallons of gas & the mileage that comes with it for free (the cost of the electricity). That & you wouldn't be hauling around the extra weight of the fuel.

 

Interesting idea if they can make it come to fruition and be workable for the general public. Until then, for me, it remains in the category of:
1. The carburetor that delivers 100MPG!
or
2. The device to allow your car to run off the hydrogen it produces!