It’s about time. At yesterday’s keynote, RIM announced a LinkedIn application for BlackBerry, joining Facebook and MySpace as some of the platform’s pillars social networking pillars. BlackBerry was built from the ground up for professionals, so LinkedIn really is a perfect fit. All of the expected functionality is there, like notifications in the Messages folder, Address Book and Calendar integration, invitation handling, home screen notifications, and plenty more. Here are a few more screenshots, but you can keep an eye on the LinkedIn blog for more info leading up the public release before the end of the year.