I haven't watched the fights yet, but Shogun and Penn are done. Rua did put a good fight up against Vera with his last fight though; and I didn't know he rematched Lyoto? Will have to find that fight.
Penn is, and always will be, among the douchiest in the binness up there with Koschek -- and both having a clinic put on them by GSP.
Glad your sleep is improving as well; nothing better than staying knocked the hell out.