The CyanogenMod team, some of the most popular Android hackers, has just released CM 10.2 Nightlies, which is based on Android 4.3 Jelly Bean. They've been really fast, as usual, considering that Google released the 4.3 a short while ago.
CM 10.2 is already available to download on their website, but please note that nightlies means that it's in a very early phase and it may have a lot of bugs and missing features. CyanogenMod is known as the most stable Android ROM, but that's available for the stable versions, while the nightlies versions shouldn't be used on a device you use day by day.
The CM 10.1 update is available for a lot of devices, but we'll only list some of them here. In order to check if your device is supported, you can check their website.
Supported devices: Samsung Galaxy Tab, Sony Xperia Z, Verizon Galaxy Nexus, Google Nexus 4, Google Nexus 7, Google Nexus 10, Samsung Galaxy Note 2 ( T-Mobile, AT&T ), Galaxy Note, Kindle Fire ( both 1st and 2nd gen ), LG Optimus L9, Samsung Galaxy S, Galaxy S2, Galaxy S3, Galaxy S4.
If you aren't sure about this update, we recommend you to use a stable CM 10.1 instead, because it's much more stable and can be used as a daily driver. Though for those who want to give it a try, we'll start flashing on our smartphone and make guides for you. You just to be patient, because there are a lot of smartphones and it takes time.
We expect to see a monthly, more stable release, of the CM 10.2 in about a month. That should be a much better and stable version, and you should wait until then.
CyanogenMod has improved the lives of a lot of smartphone owners that have been forgotten by the phone maker. There are a lot of phones that stop receiving official updates too early, so people rely on CyanogenMod to enjoy Google's new Android versions. Fragmentation is still an issue for Android and, while phone makers seem to be making improvements, updates are still slow and only a small percentage of the Android smartphone owners have the last version. At the moment, Android is at version 4.3 and only 6.5% of users are using the previous version, Android 4.2.
Please let us know how does CM 10.2 work on your device. Don't forget to specify the device too.