This Mailchimp post talks about their latest feature: advertising to your mailing list subscribers directly on Facebook. Facebook will soon let you create advertising campaigns targeting specific people by email address. So if you have an email list, you can have a campaign where you send an email, create a Facebook ad, and generally make it so that your subscribers will see your message multiple times.
As a marketer, this is pretty cool and useful. As a regular person who uses Facebook, I feel like pulling out my teeth and living off the grid.