To my knowledge, MEEI doesn't have one. Stephen Foster has one at his institute, MERSI. Wilmer, JSEI, USC, and the NIH also have them. I would expect OHSU to have one (Jim Rosenbaum) but they apparent don't have one mentioned on their website.
Actually it seems like Casey has one as well, but there's no link to it. Perhaps you can contact Dr. Rosenbaum directly. Dr. Douglas Jabs is at Mount Sinai now but I don't know if they have a uveitis fellowship there as well...
There's also Russell van Gelder - who'll be restarting his fellowship at U Washington in 2009. And I think Moorfields in London might have one, but definitely not sure about that. I was told the Nussenblatt fellowship at NEI/NIH is 2 years. Maybe that includes a medical retina fellowship??