Just got two new wiis with new dvd drive board revisions. Both are US NTSC consoles and were purchased yesterday. Their serials start with LU521
In addition to cut IC legs, these boards are also missing "pad 3" needed for installing the wiikey (same as some of the wiis that were showing up elsewhere in the world before the legs started getting cut); it's still a d2b chip though, so rebuilding to the ic leg works just fine.
Here is an initial pic of the board (I took a lot more, including final install pics, but I don't have access to them at the moment)http://www.otbmods.com/us_ntsc_cutpins_missing_pad_3.JPG
More pics to come.... if anyone is wondering where to rebuild to, it's the pin marked orange in this image: