Beyond Google... Koders.com - Open Source Code Search Engine
Found Via DotNetBoy... www.koders.com - Open Source Code Search Engine
You'll want to be careful about how you leverage the results you get in any project, but I love the concept. Google for code that searches nothing but code. I entered "RSS" and searched against C# as a language and found code that generated the news feed from the mono project.
"A significant portion of application development involves a process of find, copy, paste, and integrate. This process can be greatly accelerated when you can find existing source code that provides a solution to the task at hand.
Koders makes it easy for software developers to find existing source code that solves many common development problems with our vast index of working source code from a variety of open source projects. In many cases you may find code that solves the exact problem you are working on, and in other cases, you can find an 80% solution - where existing code can be suited to your needs with minor modifications. "
Enjoy,