You can stop trying to come up with weird scenarios in which you will get a huge rested XP boost before Cataclysm ships. It's not going to happen. If you want rested XP, you're just going to have to rest for it.
World of Warcraft: Cataclysm will destroy Azeroth as we know it; nothing will be the same! In WoW Insider's Guide to Cataclysm, you can find out everything you need to know about WoW's third expansion (available Dec. 7, 2010), from brand new races to revamped quests and zones. Visit our Cataclysm news category for the most recent posts having to do with the Cataclysm expansion.