Facebook Messenger app familiar to users of the social networking site is now available as a standalone Web site service. Facebook launched Messenger.com, which still requires an active Facebook account to use, on Wednesday. Why roll out a separate Web site for a service that is already easily accessible to Facebook users? By focusing on Messenger services only, the new site eliminates the other features of Facebook that can prove distracting, especially the time-eating News Feed. "Once logged in, people can dive directly into a dedicated desktop messaging experience, keeping their conversations going and picking up where they left off," a Facebook spokesperson told us. For now, the social networking giant reportedly has no plans to sever the online Messenger completely from its main site, as the Messenger service remains available via Facebook as well. Mobile Facebook users, on the other hand, must download a separate app to use Messenger on their cellphones and...