O’Reilly has released a CodeZoo which is meant to wrangle in the wild of opensource, and let us search through and grab
At the moment there isn’t a huge amount of data in there, but if it grows it could be quite useful.
Where I would want this site to help is in a scenario such as:
I need a Java based CMS engine that works with X, and has feature A, B, and C
I would like to then go to CodeZoo, and have information there that would help me validate my scenario. Show me what users have said about it (especially those who have implemented something on it!) and then link me to good resources.