Facebook did perfectly well on the social side of communication. But the moment it wants to enter the professional side of the communications between people - LinkedIn not going to 'like' it for sure. The rumors are spreading on the Internet that Facebook's working on a job board and that'll directly rival the largest professional network: LinkedIn. The board will aggregate job feeds from popular job boards like JobVite, Branchout and others. Do you think Facebook will eventually build a job board? Would you like your future employers to watch you partying with your friends and make their decisions based on it?