When I first looked at Koders I was unimpressed. The idea was great, a search engine that specifically searched source code. And presented it's findings in a more consumable fashion than standard search engines.
Here is an example of a search in both Google and Koders to show the difference.
Koders
Search terms used: smtp attachments
Filter: VB.NET
The search was potentially for code showing how to create SMTP attachments using VB.NET. The search actually returned only 1 result. And according to its own stats took about 1.52 seconds

This result was as shown below:
Clicking on the link below the item took me to the code in question, displayed as code, with syntax highlighting etc. While the results were certainly paltry, they were on target.
Google
Search terms used: vb.net smtp attachments
This search returned 197,000 results in, according to their own stats, 0.13 seconds
This result is shown below:
Clicking on any of the links took me to pages that were varied in terms of their formatting etc, but the results were valid. The second result returned was exactly what I was looking for.
My original complaint with Koders was and remains that it is Java centric, the depth of code for other platforms, specifically .NET is limited even though Google and Windows Live both manage to find plenty of code in just about any platform or language. I like Koders format and potential but until they can figure out how to make the coverage deeper and wider I will still use Google as my primary search tool for code.
But I will keep checking back!
Cheers,
Robert Porter