Koders: code search on the web

Recently came across Koders BETA while I was seraching for something on piece tables.
This is what it says about itself
"Koders is a search engine for source code. It enables developers to easily search and browse source code in thousands of projects hosted at hundreds of open source repositories."
Perhaps this was a much needed initiative in terms of reducing the time and effort involved in the relevant code searching. Google search is just not good enough. You get all kind of furnitures, chairs, chess, some Katmandu dinner set for "piece table", all on the first page, but to get what you are looking for you need eyes of a hawk.
Koders requires the code website to make itself listed to be searched, which is pretty reasonable, considering the ease of search that follows. Perhaps more of search niche search engines will come up in near future.