Fedora Weekly News is reporting that, beginning with Fedora 7, the distinction between Core and Extras will cease to exist:
Starting with Fedora 7, there is no more Core, and no more Extras; there is only Fedora. One single repository, built in the community on open source tools, assembled into whatever spins the Fedora community desires.
The post goes on to list three “spins” they plan to have for Fedora 7’s April release: server, desktop and KDE. Presumably these would be 1-disc installation sets, with further packages downloaded over the network, rather than the 5-CD collection needed to install Fedora 6.