halfline writes "Fedora 15 was released today. It features GNOME 3 (with its substantially redone UI) and the systemd init system by default."
The release also brings the latest KDE and XFCE versions, improved Btrfs support, amd a switch from OpenOffice.org to LibreOffice. Installation images are available from the usual sources.
If it happens once, it's a bug. If it happens twice, it's a feature.
If it happens more than twice, it's a design philosophy.