I work in Tracking and Tracing for people who owe fines in NZ and my job is essentially using Government companies search, our own Ministry fine system called "Collect", a site called OldFriends and last of all Google.
This is a core search where we search the names of people to see if they have a web based presence.
If I dont use Google to search for someone, I could get marked down when it comes to them analysing my spreadhseets to see where I have looked.
Specifically Google, no other search engine basically. And it's good, I've had alot of hits from it.