This is pretty big news -- Fedora is one of the most popular Linux distributions around, with millions of copies running worldwide. The new version of Fedora includes new desktop, system administration, and developer features.
Just six months ago it was not possible to launch the previous version of Fedora in the cloud due to kernel incompatibilities. As of this launch, the Fedora team is now treating Amazon EC2 as a tier 1 platform that must be supported for launch.
Here's a table of Fedora 14 AMI IDs. Be sure to log in as ec2-user, not root!