Less than 24 hours after Android 4.0.4 appeared on Google’s servers, we’re pleased to announce the availability of a Linaro-ified Android 4.0.4. (This is not an official release – it’s the beginning of the 12.04 builds.)
The complete source is available in our git repository – in linaro_android_4.0.4 branches in subprojects containing modifications by Linaro, or using the android-4.0.4_r1.1 tag in subprojects using unmodified code from AOSP.
To get a complete Linaro Android 4.0.4 build, run
repo init -u git://android.git.linaro.org/platform/manifest.git -b linaro_android_4.0.4 -m BUILDTYPE.xml repo sync
Where BUILDTYPE is the build type you want to use (which build type you want to use depends primarily on your target hardware) – one of landing-panda, landing-snowball, staging-iMX53, staging-iMX6, staging-origen, staging-panda, staging-vexpress-a9, staging-vexpress-rtsm, tracking-origen, tracking-panda or tracking-snowball.
Binary builds will appear shortly on android-build.
Of course, another, even faster, way to get 404 is just going here. 
Will we ever get Ice Cream Sandwich for our HTC Desire Z?
Short answer: Ask HTC — they aren’t a Linaro member, there’s not much we can do.