30 minutes ago Ubuntu 10.04 has been released, according to the features page:
Your Ubuntu, your way
Enjoy the simplicity of Ubuntu’s stylish, intuitive interface. Fast, secure and with thousands of apps to choose from, Ubuntu gives you a clean and streamlined experience that you can really make your own. And now you can even decide how you want it to look. Simply choose between our new and classic desktop experiences.
Wait for a full review in a couple of days.