If you’re using custom Cyanogen Mod Android ROM’s and want to be up to date with the latest releases when they become available then there is a service that provides free email notification service every time a new new build is released by the CM9 team for your Android device.
After you subscribe for your device with your email address, you will begin receiving updates for CM9 ROM releases for your devices repeatedly at every update with dates and change-logs for the update. The changelog allows you to see the changes that has been made into the ROM release. The email appears like this:
If you’re using any of the CM9 nightlies then this will serve you as the best way to keep up to date with the Cyanogen Mod releases. Try it out and let us know how it goes.