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Will you use Facebook’s new messaging service?

It’s official.  Soon you’ll be able to adopt your very own “facebook.com” email address.

Facebook announced a new all-in-one messaging tool on Monday, after much speculation that the social networking giant was planning a so-called “Gmail-killer.

But CEO Mark Zuckerberg stressed that his company’s new service offers a whole lot more than just email.  The new tool allows users to send instant and text messages in addition to standard email and Facebook notes, he said.

“This is not an email killer. This is a messaging system that includes email as one part of it,” Zuckerberg told reporters at a press gathering in San Francisco.

Over time, Zuckerberg argued, more and more people will switch from basic email to the integrated, cross-platform mode of communication offered up by Facebook’s new service.  More than 350 million of Facebook’s half-billion users now actively send and receive messages on the website.

Whatever people choose to call it, the new tool offers Facebook users new reasons to spend even more time on the site, posing a potential challenge to popular email platforms such as Google and Yahoo.

Being rude on Facebook

Have you ever “poked” an ex on Facebook, or rejected a “friend” request from a high school classmate you hated?

With the popularity of social networking sites like Facebook and MySpace, it can be a virtual social minefield. Britain’s Debrett’s — considered the last word on etiquette — has come up with some “golden rules” about online decorum that basically boils down to thinking before you act. Etiquette adviser Jo Bryant says, “Always employ your usual good manners when online, treating others with kindness and respect.”

How do you handle those awkward online moments? Share your stories.

(Photo Caption: A Facebook profile in an undated image courtesy of the company. REUTERS/Handout/Facebook)