I recently created a meta-search tool to find information on cakePHP.

the URL for the official version is: Cake Search

The proof of concept version (which uses cache, and therefore returns subsequent results for the same term much faster) is available here: Cache version

Hopefully the cached version will be put in place on the main site, so that you don't have time to have lunch inbetween seraching for a term, and seeing what the results are ;)