Cool Google Search Tricks

Welcome back to the continuing saga of the Googlization of the world.
Anyways, today I've found some links for cool Google search tricks.
Lifehacker's post demonstrates these 10 obscure Google search uses:
- get local time anywhere
- track flight status
- convert currency, metrics, etc.
- compare things
- use it as a free proxy
- remove affiliate links from product searches
- find related terms and documents
- find music and comic books
- ID people, objects and foreign languages by image
- recognize face
Seriously, there's some really cool ideas in that article. Read it!
Also check out these search strategies for tips for doing anything from using Google as a calculator to sophisticated site searches.
Oh dear. I've just exposed a librarian secret. So much for job security!