RIM's BlackBerry OS has just become the first smartphone platform to get an official Craiglist application. Soon you'll be able to pick up the app, which will go for $5, at the BlackBerry App World. Developed by Movela and Pyxis Mobile, the app allows users to browse, search and reply to postings in all categories and countries as well as save searches. iPhone and Windows Mobile phones version of the official Craiglist app is planned for the future. See the video below to see the Craiglist BlackBerry in action.