From Rahul:


Xen [5]  - A para virtualisation software that would enable users to run 
multiple operating systems or versions of it.
Red Hat GFS [6]  - Cluster filesystem
SELinux update - Significant number of additional deamons will protected 
by SELinux in Fedora Core 4
Free Java stack which includes Eclipse and  Apache Jakarta
Fedora Extras yum repository enabled by default
GDM early login and removal of rhgb would be a significant change in 
user experience for  desktop users
Evince document viewer [7]
Yum will use sqllite database and perform much faster that previous releases

Version of release notes this bug refers to:

FC4test3

URL of bug/enhancement (change if different):

http://fedoraproject.org/wiki/FedoraDocs/RelNotes/Core4Test3RelNotes