Facebook is a social network ,the reasons to install facebook comments in your websites are: one it will create social trust, credility,helps you know what people are saying about your website if is good comments, it will generate traffic in future,it will be your social proof of what you can do,people will trust you and your programs. The second reason to install facebook comments stream is that, it let my followers or my readers know my social status. For instance 'like' button,when people like my websites ,we see link to your website creating backlinks for your websites. Check out my website to get a long http://facebook.com/nordichukso