BLACKBERRYS mobile messaging service has come in for a lot of attention in the last few days - not all of it positive. Undaunted, though, Facebook is launching its own version. The Messenger for Mobile app, for iPhones and Android devices, is launching first in the US but is expected to roll out to other countries soon. It builds on the companys existing messaging service to allow messages to be sent directly to a cellphone via SMS, and also includes location information. It ties into the existing Messages feature, which aggregates texts, chats, emails and instant messages in one place. Its based on the Beluga app which Facebook acquired in March. Messenger is a separate app, so it only takes one click to get to your messages or send a new one. TGD