Using the search function for the "Galaxy Nexus Development" forum, I only found one really active MIUI thread: MIUI.us Weekly Release-MIUIV4.1 for Maguro- 2.10.26 w/ Miui.us Toolbox!
I added this one, have you another MIUI thread in mind to add?
Was talking about this one. Its updated weekly, is in Nexus General Section.
http://xdaforums.com/showthread.php?t=1772970