Don't worry about the cold and rainy weather sweeping through parts of the country, it's okay to bust out your open source swimming trunks anyway. Canonical today invites you to dive into Linux with the release of Ubuntu 11.04, otherwise known as Natty Narwhal. This latest Linux distro, which has been in beta form for about the past month, supports laptops, desktops, and netbooks, and supersedes Ubuntu Netbook Edition for all PC netbooks, Canonical says.