C'est bien ce que j'avais dit:
What font is used in the logotype?
The font in the logotype is Bryant2. This font is not a free font, but it was chosen because it best complements the logo design. The license for use of this font in the official logo is paid, so the logo can be used wherever the trademark and usage guidelines allow without further cost. There is no need to buy this font to produce artwork for Fedora, since the logo itself should never be modified. For more information refer to this message on fedora-art-list:
http://www.redhat.com/archives/fedora-art-list/2006-August/msg00266.html