On the left-hand side of the Google Voice user interface, next to Contacts, there is a + (plus) sign, and when you click it, it maximizes into a list of 5 people.  I did not choose any of the people on the list, how can I change them? Thanks!
Google Voice: how to change speed dials?
google;contacts;google voice;user interface
As far as i know, you cannot change them. See here.