I'm thinking of trying the On Deck sports bar -- http://www.ondecksportsbar.com -- in the Pearl District (NW 14th/Kearney). I called and the person didn't know what ESPNU was, but was told they got "pretty much every sports channel."
EDIT: Called back Sunday morning and was told they did get ESPNU, so I'm gonna head down there unless someone comes up with a better place.
EDIT: Called back Sunday morning and was told they did get ESPNU, so I'm gonna head down there unless someone comes up with a better place.