Alon and Blake Vaknin -- eight months pregnant -- watched the first tower collapse from their apartment a block away, then fled with their daughter Maia.

CNN: Air quality concerns hover over ground zero

"It just concerns me, " Blake Vaknin said.

CNN: Air quality concerns hover over ground zero

Sharon Vaknin at CNET has a solid post on how to use it for personal use, but you can get a glimpse of how it is changing for small business owners: How to Get Started With Google Now (link at end).

FORBES: Search Engine Marketing And SEO Via Google Now - Plus Ten Web-Based Tools