Description of problem: For Fedora 18 there will be a new upgrade method (fedup) and documentation should reflect this change. Unfortunately it's still quite unclear, fedup is not yet packaged and the future of preupgrade is not yet known. So consider this more as head-up from blocker bug review meeting. I'll try to update this ticket with current upgrade methods status.
Thanks for this, Jaroslav. Has there been any update on the status of upgrading within anaconda in the last few weeks?
Cancelling the needinfo, as I'm working on the required updates for fedup with Will Woods and by drawing on the wiki material. I'll update this bug when they're finished.
fedup has now been documented in the Installation Guide: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/ch19s02.html