Checkup: 24 Hour

Choosing a Pediatrician

What criteria would you be certain to use when choosing a pediatrician for your first kiddo, first everything?? (i.e. someone always on-call, good office hours, well-child waiting room, young or old doc, etc.) Anyone have a good recommendation on a great pediatrician? We are adopting and do not have a baby yet, but could get a phone call and have one within less than a 24 hour period, so I need to do the legwork now. :)