In case you haven’t heard, in reverse alphabetical order…
Ubuntu 11.04 is out with Unity as the default desktop interface. http://ubuntu.com
RHEL 6.0 was released in Nov 2010, but RHEL 6.1 Beta was released in March http://redhat.com.
openSUSE 11.4 was released in March. http://opensuse.org
Fedora 15 will be released in a few short weeks featuring Gnome 3 as the default desktop interface. http://fedoraproject.org
Debian Squeeze 6.0.1 was released in March. http://debian.org
Other distros like arch having rolling releases.
What cool new distos are you using these days as the summer heats up? What informed opinions do you have about the decisions that made up these releases and others?