The latest version of the popular Linux distribution Fedora is out:
"Fedora Project" - http://fedoraproject.org/
I love Fedora so to me, a new release every 6-7 months is like a new toy to get excited about ;-) I have been using Fedora Core 6 fulltime in work now for the last 5 months and have been very impressed with it, so I am looking forward to trying out this new version.
The release notes are here:
"Fedora Release Notes" - http://fedoraproject.org/release-notes/RELEASE-NOTES-en_US/
Updated 2021 : note that the above post is out of date as it was originally published in 2007, but is left here for archival purposes. The external links are now dead so I have unlinked them. You can now find Fedora at https://getfedora.org/