I have an idea for drupal.org. I have many times searched and searched for the correct module for a job. I would like the ability to mark my favorite modules, themes, and sandboxes while logged in on drupal.org. It would also be good if one could add a note to the bookmarks for their information. Might also be nice to be able to mark them as public or private as well. Maybe a block on the dashboard to display them.
Another idea would be to give a "Favorite" rating to modules, themes, and sandboxes based on how many people have marked them.
The whole idea would be so people do not have to save a bunch of bookmarks in their browser but can easily then see a list of their bookmarked favorites as well. It would also let other see what modules, themes, and sandboxes others Favorite too if there is an ability to make them public. This would be something like the like button on Facebook fan pages but in this case for each modules, themes, and sandboxes project page.
However you might want to make this two separate new features for drupal.org, bookmarks/favorites and likes.
I hope this is understandable and think that this would be a very good social feature(s) for drupal.org that would help others better select and find modules, themes, and sandboxes.