I'm waiting to hear back from Yale, too; I applied end of December, went complete end of January, and nothing.
Hearing about all these rejections on LSN in the past 24 hours is making me worry, though. Granted, no thin white envelope from Yale in the mail today (and I would assume, as I live rather close to Yale, I would have gotten it today), but still...well, as I always say, it's all in God's hands so I just need to be patient and see what His plan is.
I do hope it works out for all of us who are waiting though!!! Good luck!