Facebook's new unified e-mail and its implementation is causing unwanted changes to users' address books; worse, the changes have gone unnoticed by users and vital communication is being lost.

Mashable.com: Facebook’s facial-recognition acquisition raises privacy concerns When users send an e-mail to your Facebook.com address, it pops up in your Facebook inbox.

Nobody wants an e-mail address like 123456789@facebook.com and Facebook can’t just assign e-mail addresses based on people’s first and last names since there are too many duplicates.

Changing your e-mail address and having to tell everyone you changed it is nearly as bad as changing a your cell phone number. People just don't do it.

And today, TechCrunch also said Facebook will unveil its e-mail service, called Titan. Facebook's invitation, styled like an air mail envelope, suggests there's truth to the reports.

Facebook announced Monday that it is building a full-fledged e-mail system into its 500-million-member social network. Facebook CEO Mark Zuckerberg said the new e-mail offering will be introduced ...

Facebook began its jaunt as an e-mail service in November 2010, when it started allowing users to make @facebook.com addresses and receive conventional e-mails addressed there in their messages ...

Facebook isn’t pitching this as an alternative to Web-based e-mail like Yahoo Mail, MSN Hotmail, and Google’s Gmail. “We don’t expect anyone to wake up tomorrow and say I’m going to shut ...

E-mail is inherently a social activity, which makes it a perfect fit, at least in theory, for Facebook. E-mail is all about communicating with people you know by sending and receiving messages and ...

Facebook’s 500 million users will be able to get an @Facebook.com e-mail address that will allow them to communicate within and outside the Facebook network.

Mashable.com: Facebook quietly tests shareable ad units First spotted on Saturday by blogger Gervase Markham, the e-mail address you once listed as your point of contact is now hidden in the site ...

You can then hide your Facebook email address from the contact page and elect to highlight another e-mail address. Mashable.com: Friendthem plans to sue Facebook for ‘find friends nearby’ feature ...