Okay, here's what I know. Android 2.1 is up on the AOSP. Google, Motorola, and Verizon have all said the Droid would get the update both a few days after 2.1 goes open-source AND before the end of January. I'd imagine the 25th or 26th.
The source started going up over a week ago. The SDK has been up for even longer than that.