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I think it would be cool for him to have some unique items. He is cool but I feel like he lags behind the other NPCs at higher levels, but I still really want to use him for the novelty.
Maybe some booties or a little helmet. You could even make him some armor like the polar bear dude from that atrocious Golden Compass movie. It would be goofy and kinda cute... but hey, he's a bear!
Maybe some Mittens of Mauling similar to the types of gloves that monks get. They can give him the ability to add like 1d2 of elemental damage. Maybe you can combine them all (like adding heads to the Flail of Ages) to create a cool unique item.
Also: Picnic Basket of Holding (hey... Hexxat got one)
PS: I'm actually being dead serious. I actually would gladly pay a couple bucks for a DLC like this