There has been announcement made regarding the availability of Android 4.0 Ice Cream Sandwich Code by the Open-Source Project of Android team. This version is latest and updated which can be seen not only on Galaxy Nexus that is going to be released in future, but also on various other Android Devices.
For the Android 4.0.1 version this source code has been released and soon or later this can be seen on upcoming Galaxy Nexus. With the help of this source code which has an device build target included in it, a system image can be built by developers for the upcoming phones . CyanogenMod is considered as the Most popular among the custom ROMs and it can be created using this source code by the developers.
The Android code tree history has been made available along with this release where Honeycomb is also included. Inorder to download you can go to Android Building Google Group and there you will be able to see the links. Before you synchronize anything just make sure that the copy is full as there is still some upload process going on by the developers.
So even for the older versions of mobiles like Galaxy S there will be an availability of Android 4.0 Ice Cream Sandwich. There are many improvements made on the latest OS like typographic refreshed look, better folders, face unlock feature, handling of fontsand the interface is totally revamped.
