The rumors just got started by Cramer. I don't think anyone is saying they're actually in talks yet, but Cramer said he thinks it would be a natural fit and would compete well with linkedin. So it's just speculation, really, but Cramer is influential to a lot of investors, for better or worse.
I hope you're right. It makes sense to me. Think about it - for a career section of its website, Facebook could use a "barrier" between friends and career acquaintances. Otherwise, people would be afraid to mix the two online. So, owning Monster would allow that. "Monster by Facebook" sounds catchy. Plus, if Facebook buys Monster, it acquires an instant infrastructure, sales force, software/customer user-face, clients and branding.