Today, November 15, Facebook is expected to present a set of new features including the new mail service unofficially called Project Titan, which is positioned as a ‘Gmail-killer.’ The biggest social network is said to provide personal @facebook.com email addresses to over 500 million users all around the globe.

“They are not trying to do a standalone rival to Gmail. They are building an integrated experience in everything they do,” stated one of the insiders, who preferred to keep his (or her) name under wraps. Facebook CEO is to unveil the new feature at a press conference in San Francisco, and so far the company’s officials refuse to give any comments on the issue, that’s why all the information available to date is obtained from either anonymous sources or comes as assumptions by online media. In its envelope-styled invitation to the special event, which starts on 10:00 am, Facebook hasn’t even specified what Mark Zuckerberg will be discussing. Still, the speculations about the new service have been in the air since February, and now has come the time to dot all the “i”s.

“All of the e-mail vendors should be worried—Google, Yahoo, MSN. All of those platforms have been trying to add social networking features to their services,” told Altimeter Group analyst Jeremiah Owyang to New York Times (he was not briefed on Facebook’s plans). The social media network has recently launched a variety of new services focused on improving online communication (heavily discussed “Places” is among them). The upcoming services are also “an opportunity for Facebook to spend more time with consumers. The more they own of our digital day, the more money they will make,” continued Owyang.

Last week, Google introduced an amendment to its user policy, saying that from that time on other services couldn’t import its contacts without offering reciprocity—Facebook doesn’t.