For starters, note that before I did this I verified I can delete a bucket and another account can create a bucket with the same name.  So, transferring the name is fast, easy, and painless.  That said, since it's a first-come, first-served sort of deal, I went ahead and grabbed these names:

fedora-ami
fedora-cloud
fedora-cloud-sig
fedora-hosted
fedora-images
fedora-images-ap-southeast-1
fedora-images-ap-southeast-2
fedora-images-ap-southeast-3
fedora-images-eu-east-1
fedora-images-eu-east-2
fedora-images-eu-east-3
fedora-images-eu-west-1
fedora-images-eu-west-2
fedora-images-eu-west-3
fedora-images-us-east-1
fedora-images-us-east-2
fedora-images-us-east-3
fedora-images-us-west-1
fedora-images-us-west-2
fedora-images-us-west-3
fedora-pvgrub
fedoraproject
fedoraproject.org
fedorahosted

"fedora" was already taken, 'natch.  I didn't know what you all might have wanted, so I more or less just grabbed lots of random names.  If you want me to snag another for the moment, let me know.

Brian