"Here's what the official press release won't tell you about Ubuntu 9.04, which formally hit the streets overnight: its designers have polished the hell out of its user interface since the last release in October."
Here is your chance to play with Ubuntu 9.04 "Jaunty Jackalope" . You will need to download the ISO then burning the image to a CD (I use image burn) then just boot to the new CD you burned. If you want to install it on your computer, just click the icon on the Ubuntu desktop. If you only want to play with Ubuntu, when your finished just reboot and take the CD out.
Have fun with Ubuntu 9.04 "Jaunty Jackalope"