Seriously pondering these for the front walk & driveway:

They charge during the day, and glow at night. I like the assymetrical, scattered arrangement from the example in Dallas.

• http://ledpavers.wordpress.com/2010/07/26/solar-cynergy-solar-led-paver-lights/image003/
• http://inhabitat.com/2010/07/28/luminous-solar-cynergy-pavers-light-up-the-night-in-dallas/
• http://www.solarlightworks.com/
• http://shop.tjb-inc.com/solar-powered-4-x-8-led-paver-light-for-walkways-patios-driveways--pool-decks-p1546.aspx 

Update: ok just showed the first photo to husband. He digs it big time. Posed this idea: putting some of these pavers in the backyard too...