I rely heavily on Wikipedia. During one internship in Berlin I could amaze my boss with up-to-date in-depth information on a current affairs topic thanks to Wikipedia. And its so huge and comprehensive. It even has a Bangla language version for my need.

Here is a New York Times magazine article describing how Wikipedia turned into a leading source for daily news. Some excerpts:

Increasingly, it has become a go-to source not just for reference material but for real-time breaking news — to the point where, following the mass murder at Virginia Tech, one newspaper in Virginia praised Wikipedia as a crucial source of detailed information....