Facebook hits 100 million mobile users – puts chat on all IM clients 11.02.2010 Social-networking player Facebook is now being used by more than 100 million mobile phone users around the world. The company today unveiled a new feature that allows people to use Facebook chat within various instant messaging (IM) clients using the Jabber protocol. Facebook has reached the 100-million mobile device milestone just six months after it revealed that 65 million people were using it on their mobile devices. More