Professional social networking site LinkedIn has launched a mobile version of its free service, which will be compatible with BlackBerry devices, iPhones and other mobile devices. LinkedIn currently has more than 19 million members; the company said it hopes the mobile offering will help expand the service. Unlike Facebook and MySpace, LinkedIn primarily focuses on professional networking services.

The new mobile offering promises features that do not require much typing and could make it easier for users to invite new contacts, quickly find out more about people they meet and set up spontaneous meetings while on the go.

LinkedIn also said it plans to begin offering services in six languages, including Chinese, English, French, German, Japanese and Spanish.