Krugle - A Search Engine For Coders

[Diplo]

http://www.krugle.com/

Unlike conventional search engines, Krugle is designed to locate code. Krugle supports code search by crawling, parsing and indexing code found in all open source repositories, as well as code that exists in archives, mailing lists, blogs, and web pages. And Krugle makes navigating code repositories easy. For example, you can quickly navigate downward (from “Apache” to “Tomcat”), or start with a single source file and then view it’s relationship to another file, to see how it’s used. This ability to interactively browse and explore code in a meaningful context provides a more informed view and reduces the time required to make good code decisions.

It's not live yet, but sounds like it could be damn useful... There's also an article on Wired about it calling it, "The google for coders".