The Alpha release of Fedora 15 is expected to hit the news on a few hours (the torrents are already up if you think it is a reason to hurry), which makes this leak even more sensational, as the Beta release is scheduled in about one month from now.
It was leaked from trusted sources the biggest feature that will hit the code in the meantime, based on user feedback, and the info is certain, it is proved by the screenshot below, taken from actually running code: icons will be returning to the GNOME 3.0 desktop.
The info is even juicier, not any icons will be provided but the default install of the Desktop (GNOME) Live CD will come with the set of icons which are more useful for any desktop user, shortcuts for downloading and installing proper desktops, like KDE, Xfce and LXDE and also for wiping the Linux partitions.
Unfortunately a large-scale user survey revealed most new potential users will choose the last option (returning to Windows), after the suicidal moves that happened inside the GNOME desktop with the migration from the 2.x to 3.x branch, this is why this option is the last in the list, with the hope a few will still remain as Linux users in general and Fedora users in particular.
An unconfirmed last-minute rumor tells until final the list may be completed until final release in May this year with another option, for downloading and installing Ubuntu with Unity, but it comes from a less trustworthy source, so keep it so far only as a rumor.