A new build of the Jam is available at
http://imalone.fedorapeople.org/ N.B. that the Fedora beta hasn't been
finalised yet, so this is still pre-beta software and the may be bugs
in the installer.
Unlike the previous one this is a vanilla (strawberry?) jam spin, so
you'll see a blank background: the jam theme isn't available through
the repos yet so isn't used here, but the Jam background is included
if you want to use it.
--
imalone
http://ibmalone.blogspot.co.uk