A patch for the boost headers is required to allow mapnik to be rebuilt: http://lists.berlios.de/pipermail/mapnik-users/2009-November/002550.html Without this, mapnik build will fail: http://koji.fedoraproject.org/koji/taskinfo?taskID=1942060
Note this is for version 1.41 of boost in rawhide.
I added the patch and built a new package. Please close the bug as soon as you make sure that it fixes your problem. http://koji.fedoraproject.org/koji/taskinfo?taskID=1942307
Thanks for the patch! Looks like mapnik successfully rebuilds: http://koji.fedoraproject.org/koji/buildinfo?buildID=152992 so closing bug.