Almost all imported fine with the exception of the Private Messages.
From the logs
Server Error Log
Error Info
 		ErrorException: unserialize() [<a href='function.unserialize'>function.unserialize</a>]: Error at offset 32 of 37 bytes - library/XenForo/Importer/vBulletin.php:1058
Generated by: 
Nathan, Today at 12:21 AM
Stack Trace
#0 [internal function]: XenForo_Application::handlePhpError('a:1:{s:2:"cc";a...')
 #1 /home/..../..../..../forums/library/XenForo/Importer/vBulletin.php(1058): unserialize(0, Array)
#2 /home/..../..../..../forums/library/XenForo/Importer/Abstract.php(77): XenForo_Importer_vBulletin->stepPrivateMessages(Object(XenForo_ControllerAdmin_Import), Object(XenForo_ImportSession), 'privateMessages', 0, Array)
 #3 /home/..../..../..../forums/library/XenForo/ControllerAdmin/Import.php(152): XenForo_Importer_Abstract->runStep(Object(XenForo_Importer_vBulletin), Object(XenForo_ImportSession), 'privateMessages', 0, Array)
 #4 /home/..../..../..../forums/library/XenForo/ControllerAdmin/Import.php(204): XenForo_ControllerAdmin_Import->_runStep(Object(XenForo_Importer_vBulletin), Object(XenForo_ImportSession), 'privateMessages', Array)
 #5 /home/..../..../..../forums/library/XenForo/ControllerAdmin/Import.php(147): XenForo_ControllerAdmin_Import->_startStep()
#6 /home/..../..../..../forums/library/XenForo/FrontController.php(303): XenForo_ControllerAdmin_Import->actionStartStep(Object(XenForo_RouteMatch))
#7 /home/..../..../..../forums/library/XenForo/FrontController.php(132): XenForo_FrontController->dispatch()
 #8 /home/..../......../forums/admin.php(13): XenForo_FrontController->run()
#9 {main}
Request State
array(3) {   ["url"] => string(57) "
http://..../forums/admin.php?import/start-step"   ["_GET"] =>
array(1) {     ["import/start-step"] => string(0) ""   }   ["_POST"] => array(2) {     ["step_privateMessages"] => string(23) "Import Private Messages"     ["_xfToken"] => string(53) "1,1286320873,44813411846e0ba157cc5381d78ceefb8ad4722d"   } }