• by David Goetzl  @dgoetzl, December 9, 2009

As Summit attendees mull over how email and social media will ultimately interact, Facebook is quietly launching a program that could thrill an email marketer.

It came to light Monday during the keynote address given by Merkle senior vice president Eric Kirby.

Email marketers could begin to approach Facebook’s 100 million U.S. users to build their email lists. This month, Facebook says marketers will be able to begin asking its members for their primary Facebook email addresses.

“It may turn out that Facebook becomes a key component of your email list growth strategy,” Kirby told the Summit attendees.