Johnhaydon teaches you how to use Seesmic to manage your Facebook stream. For the Seesmic desktop app you have to go to the bottom left corner of the screen and click the little icon of gears. This will bring up an options menu. Click the Accounts tab. Then click on Facebook and add your details there. Next to each post on Facebook, in Seesmic, to the right, you will see a small icon. Click that and you will have options like commenting. You can also reply to a post by clicking the dedicated icon next to a person's picture when they've posted something.