TORONTO — BlackBerry's maker, Research in Motion Ltd., announced Wednesday it has launched software that will make it easier for Facebook users to use the popular social networking site.

The site has already been available through the BlackBerry's Web browser, but the new software will allow BlackBerry users to automatically receive Facebook messages like they receive e-mail on the BlackBerry.

T-Mobile USA will be the first carrier to provide the new application to its customers, as a free download.