Possible Duplicate:
I upgraded from an alpha or beta - am I up to date if I keep upgrading?
If I've installed ubuntu 12.04, do I constantly have to download a new daily build to get the lates features or do the updates will automatically add them?
Simple answer really - any ubuntu installation, whether the stable/alpha or beta will receive updates as and when the package maintainers release new updates.
Thus for 12.04, a steady stream of updates are usually made available - several megabytes a day. You can usually just leave update-manager to receive your updates.
Personally, I leave alpha/beta updates once a week because you usually see many releases of the same package over a short period.
I also separately maintain the ISO download via zsync. In that way, if you need to trash the release, you can reload from a very recent snapshot rather than loading the last alpha/beta and updating from there.
Hang-out on the developers forum over at ubuntuforums.org. You usually get wind of major issues quickly - that way you can make a judgment call when to best update.
Linked Question:
