Interesting read about the pros and cons about working from home (thanks +Filipe Cadete for sharing this!) in the +The New York Times. In essence working from home promotes productivity and working at the office promotes creativity.
It's exciting to see how big tech companies like Google/Facebook and now also Yahoo try to make life at campus as great as possible to sort of getting you hooked on getting to work. Also by limiting your desk space and closing doors at work to increase serendipitous encounters.
Ballad of a Beardless King