Our driveway is trashed (a house is a money pit. Steven better get tenure) and we are going to have to replace it in the next couple years. I would love to put in a green driveway because it's beautiful and better for the environment by limiting run off into sewers and heat trapping.
I like the idea of spacing pavers a few inches apart and allowing grass to grow
Or using something like Unilock's turfstone, concrete pavers made in a honeycomb pattern that let grass (or more likely weeds) grow in the spaces.
Or we could go old school and take the driveway out and just put two strips of concrete where the wheels go. I love that!