Does Facebook it still allow notifications?
More info: http://forums.b2evolution.net/viewtopic.php?p=108838#108838

Yes, through its API. Mailchimp, for example, offers this service. I have seen other blogs do this as well. I would expect the option to be similar to the Twitter plugin.

Can you please post a link to the Facebook API page that describes this. Last time I searched all links to such pages would result in 404.