I have recently just started building RPMS for development versions of Inkscape. The previous stable version of fedora was first released back in August 23, 2010, so these development versions have a bunch of new features and improvements. There are currently builds for Fedora 17, 18 and 19 available. I hope to be able to update this to the inkscape trunk at least once a week.
To set this up on your Fedora machine, first download the .repo file:
sudo curl -o /etc/yum.repos.d/fedora-inkscape-unstable.repo http://repos.fedorapeople.org/repos/ryanlerch/inkscape-unstable/fedora-inkscape-unstable.repo
Then tell yum to update inkscape:
sudo yum update inkscape