NexusHD2-ICS-CM9 is my first CM9 Mod ROM built from the source code of the samuaz's git repository. (Big thanks to samuaz.)

• Include Android 4.0.3 CM9. (All current CM9 works, Enhanced Power Menu, Power Notification Widget, Trebuchet Launcher, T9 Dialer, etc.)
• Include tytung's 2.6.32.15 ICS kernel v1.
• Include tytung's ICS ramdisk (initrd.gz).
• Include the required proprietary binary files and the HD2-specific files from my AOSP GB ROM (i.e. NexusHD2-Gingerbread).
• Credits: tytung, samuaz, texasice, firesnatch, ankuch, rapmv78, romanbb, the CM and Evervolv teams, etc.

You can find the SD version in the SD thread.

Features:

• Android 4.0.3
• CM9
  • Enhanced Power Menu w/ Reboot and Screenshot options, etc.
  • Power Notification Widget
  • Trebuchet Launcher
  • T9 Dialer
  • Keep app back button in Developer options
• Root, busybox, zipalign, init.d scripts, etc.
• AdFree hosts file
• HSDPA icon
• Facebook contact sync
• Unicode support for SMS/MMS

Downloads:

• ROM: NexusHD2-ICS-CM9_V1.0.zip | mirror1 | mirror2 | (No more mirror please. Thanks.)
  md5sum:  B40B9A15C3BEA456D3E04E4C541373A7
• cLK kernel: NexusHD2-Kernel_2.6.32.15_tytung_ICS_v1-cLK-update.zip.
• MAGLDR kernel:NexusHD2-Kernel_2.6.32.15_tytung_ICS_v1-MAGLDR-update.zip. (Default in this ROM.)

Installations:

• Please use at least 200MB system partition and at least 2MB cache partition.
  • Please refer to ksubedi's HD2 NAND Toolkit and/or mskip's guide.
  • Cache partition (/dev/block/mtdblock4) is only used by CWM.
  • Cache partition size is not important because the data partition (/dev/block/mtdblock5) is used as the cache space when running Android.
  • If your HD2 has bad NAND blocks, you may need larger partitions.
• Wipe
  • Wipe Data/Factory Reset while doing a fresh install.
  • Advanced -> Wipe Dalvik Cache while upgrading and wanting to retain data.
• Flash this ROM.
  • MAGLDR: Flash NexusHD2-ICS-CM9_V1.0.zip, then reboot.
  • 　 cLK　 : Flash NexusHD2-ICS-CM9_V1.0.zip and the cLK kernel, then reboot.

Extra Downloads:

• Enable/Disable the virtual soft keys (i.e. the on-screen virtual button):
  • Flash framework-res-apk_v403cm9_without_softkeys.zip (Default)
  • Flash framework-res-apk_v403cm9_with_softkeys.zip (To fix the overlay of the softkeys and the keyboard, install ICS keyboard from the Market or get the apk here.)
• (Optional) Increase the internal storage size via any types of A2SD scripts:
  (Flash any of them only when you install too many apps and the internal memory (i.e. data partition) is out of space.)
  (Caution: Don't use any of them if you are not an advanced user. Otherwise you may have low volume, screen lag and other strange issues.) 
  
  • Installation guide for 40ad2sdx-a2Recovery.zip
  • Installation guide for Data2SD.
  • Installation guide for AD2SDX - AMARULLZ DATA TO SD-EXT.
• About the mobile data connection types: RMNET V.S. PPP.
  • Bootloader MAGLDR supports both RMNET and PPP. I set RMNET as default for MAGLDR ROM because stock Android only supports RMNET.
  • Bootloader cLK only supports PPP.
  • RMNET is more stable than PPP. (Some PPP users have data drop issues.) However PPP may be faster for some users.
  • Flash RMNET_to_PPP_update.zip if you prefer PPP on MAGLDR.
• Flash Mms app blurry pic fix if required.
  

Working:

• Phone
• Audio
• SMS
• Data: 3G/HSDPA
• Wi-Fi
• Bluetooth
• GPS/AGPS
• Touchscreen
• Vibration
• Charging
• All sensors
• Wired earphone/headphone
• Data usage
• Hardware Acceleration
• Software video codecs
• WiFi signal strength icon
• USB Mass Storage
• Camera (Please visit rapmv78's thread for more info.)
• WiFi Tethering (Native "Portable Wi-Fi hotspot" feature works well. You can also install wireless_tether_2_0_7.apk for more features.)

Not Working:

• Native USB Tethering
• VPN