This is a very, very early preview of ZeusDroid's Desire ROM. It cannot receive calls while 3G data is on, nor is there BT. Some apps aren't working in landscape, and there are some graphical glitches. However, it is a very good proof of concept, and Sense is up and running on Moto Droid.
If you want to give it a shot, you can find the nandroid backup here:
Looks like the ESE53 leak that's been floating around for a while now is the official OTA update that Droid users should be receiving starting March 18th. Verizon will be following the same strategy as before, releasing the update to a set number of people per day, though this time it is much higher ~250,000 a day. That means the latest anyone should get it is the 22nd (there are a little over 1m Droids in use)
Here's the post over at Engadget, with a link to the actual Verizon page detailing the update.