I really like the Orioles logo. I never would have even heard of this bird if not for the team, and I like the realism. Those old-school cartoonish bird logos are horrific. Get one of the real birds and pay proper tribute to this diminutive, but proud animal. The alternate "O's" hat that's getting popular now is OK, but inferior.
Also, the black/orange combo is one of the best you can use for a color scheme. The Orioles didn't really have a choice, since that's the color of the actual bird, but you can't go wrong with that color. The Giants, Bengals, etc., all look great.
Incidentally, I can't stand blue and orange. Something about that combo evokes a primal rage within me. It helps that teams I don't like like the Broncos and Mets wear them, but even Boise State, which is college so I couldn't care less about them, turns me off because of that color combo.