Both Yahoo! and Google have a sort of "Build Your Own" Search Engine tool:
Yahoo BOSS:
http://developer.yahoo.com/search/boss/
Google Custom Search Engine:
http://www.google.com/coop/cse/

"Google Earth's new mapping programme takes you on a virtual reality tour with the UN refugee agency of some of the world's major displacement crises and the humanitarian efforts aimed at helping the victims."
http://www.unhcr.org/events/47f48dc92.html

Google Gadget Ventures: Google as a VC
http://www.google.com/gadgetventures/