SDX forum members have tested the ROM out and found it working, with the exception of some of them not being able to log into the Market. A phone reset reportedly fixes this problem. Of course, proceed at your own risk.
Here is the ROM information from the leak:
firmware version: 2.1-update1
baseband version: s:m900.8.os.dd03
kernel version: 2.6.29
build number: elcair.dd03
Update: here is a video of Moment with Android 2.1 and some live wallpaper action: