I think Hendo gave Rampage his PRIDE belt. Maybe last year, there was a youngster on Sherdog who plays internet video games with Rampage and I think he was at Rampage's house and took pics of the belts on his mantle.
It unifies into the UNDISPUTED UFC (add weight division here) Championship. I would LOVE to see GSP vs Marquardt. Would be a great fight. We first have to see how Marquardt does against Saffiedine later this month.