The site wide search enhancement underway by Google Summer of Code participant, Shashikant Vaishnav, got an update to Moodle.org recently. According to the post,
[the] plugin is working well with course content search. We have also indexed rich type attachments(Course Summary and Course Overview files).
Comment and provide feedback at https://moodle.org/mod/forum/discuss.php?d=232803. Read all of the weekly progress reports and see more screenshots at http://shashitechno.wordpress.com/. Check out a few of the screenshots below (which are replicated from the project update discussion post at Moodle.org):
