Earlier this week Facebook announced some significant changes to the way users can search on their site. Users are now able to search for comments that friends have made in the last 30 days. In addition you can also find out what any users with a public profile are saying about a particular topic or news events.
This means that Facebook users with public profiles will have to be extra careful as to the comments they make as it will not only be their friends that can see this but anyone on Facebook.

The changes in Facebook search bring a new kind of emphasis to the significance of Facebook when it comes to Reputation Management of brands online.  It opens up a whole new source of information as companies will be able to monitor conversations between friends and acquaintances in relations to their brands.
It will be interesting to see how this develops as Facebook makes more changes and possible expand the range of search history in the future.