Espresso in Honolulu??
the best espresso on island, imo, is Glaziers Coffee, on King street east of University. the owner, Sam, really cares about making good coffee and has styled the place on the best coffee places he knew when he lived in Seattle.
He will even make nice shapes with the foam atop your espresso or capuccino. Worth a try.
Also, there is a great coffee shop in the North Shore, the name escapes me.