Facebook just released a new app from the Creative Labs division called Mentions. Anytime someone on Facebook mentions your name or brand, the app captures the post and adds it to your Mentions feed. From here, you can easily respond with a comment. You can also use the app to upload your own updates and run live meet-ups.
One thing. You have to be a celebrity in order to use it.
Mentions is currently only available for people with verified Pages in the US. We plan to roll out to more countries and verified Profiles in the coming months. If you are an admin of a verified Page, you can request access to Mentions directly. If you are a public figure, you can also download the iPhone app to request access.