According to an article I found [0]

> Graph Search will now let some members uncover status updates, photo captions, check-ins, and comments.

Seems it's still not available for everyone, at least it doesn't work for me. Good thing it's finally coming though.

[0] http://www.cnet.com/news/facebook-expands-graph-search-to-le...!

Graph Search is an answer to a question I've never had.