I'm the MSt offer holder on the results board. I received an email yesterday, with a scanned letter of acceptance attached. I was also informed in the letter that my Clarendon application was unsuccessful (still VERY happy though). Although I can't verify this, a poster on The Student Room boards indicated more emailed and snail-mailed acceptances would go out on Monday. Best of luck to you!
Any info out there (gossip, hearsay, rumor) about when the Columbia notifications will go out? Are there any current Columbia MA or PhD students reading these boards, who might have some sense from department goings-on?