Who am I? I'm wondering after having been utterly unable to log in to my very-long-time LinkedIn account using my own email addresses (all of which feature the words "sarah" and "gilbert" prominently). While it's true I keep no extraordinarily private data in my account profile (the fields for "social security number" and "mother's maiden name" aren't yet a feature of the social networking site that's been valued at $1 billion), still, when I discovered that a complete stranger was accessing my account using her own very different email address (her first name is "Kristin" and we have a few friends in common, but absolutely nothing else), I was rattled. This is both bizarre and troubling.

She found my email address through one of our common friends, and sweetly sent me her password, so I could actually be me for a bit. I approved a couple of pending connection requests. I sent an urgent, full-of-exclamation-points email to LinkedIn. [As of mid-afternoon on May 27th, I've still heard nothing from LinkedIn, and a scan of recent Twitter messages showed scattered problems.] I asked my friends if they'd heard of anything like this, and found one similar problem (as far as I can tell, it was unresolved). I'm so fortunate that it was a friendly connection and not someone bent on masquerading as me (which could have ranged in dangerousness from the mild -- wildly recommending people I don't care for, maybe -- to the seriously fraudulent). What if Bill Gates had his identity gifted to someone else? Salacious, no?

However mild or serious the result of this security breach, it's not something to be taken lightly; and a bug like this could turn off professional users who trust LinkedIn with their resume; it's certainly not befitting a billion-dollar company built on the concept of identity. News Corp., are you still interested?