The CyanogenMod team has started releasing nightly builds of CyanogenMod 9 for a handful of phones and tablets. CM9 is based on Android 4.0 software, but includes a number of tweaks and modifications.
Alpha builds have been available for some devices for a while, but now you can get the latest updates each night if you have a supported device.
Right now nightly builds of CyanogenMod 9 are available for the Samsung Galaxy Nexus, Samsung Nexus S, and the Motorola XOOM and a few other devices. Additional phones and tablets should be added to the mix soon.
Nightly builds for CyanogenMod 7, based on Android 2.3 Gingerbread will also resume soon.
You can find the latest nightlies at the CyanogenMod download page.
via Android Police