Here is Google’s answer to the question:
How do you create and maintain efficient JavaScript code that downloads quickly and works across different browsers?
The Google Closure tools package contains a Javascript compiler/optimizer, a library Java and Javascript, and template system for both as well. It is probably no huge surprise that the search giant–and apparently burgeoning programming tools provider–would come up with a package this slip to make life easier for JavaScript programmers.
Totally different area: have you seen Google Dashboard yet? It’s info on all of your Google accounts in one place. Hmm, they certainly do know a lot about me…

