You can report potholes online at http://www3.honolulu.gov/genex/main/frmForm.aspx?id=1&sFlag=1.  At least in my area, the response has been surprisingly fast considering it's the city.  You can remain confidential if you choose but input a good description of the location, e.g. which side of the street and vicinity of a landmark such as a street address, an intersecting street, a fire hydrant, crosswalk, etc.  The patches don't last long but it's better than nothing.