Fedora 17 does come with pre-built Bacula, but the important virtual tape-changer software is a separate SourceForge project and Fedora-people don't seem to include it.
I found a SPEC-file for vchanger and built binaries. The src-RPM is also there, go get them if you need'em. The goodies are at http://opensource.hqcodeshop.com/Bacula/.
