I've had good luck with the Royal Jordanian web site, as recommended by others on here. There are other OneWorld airline web sites that show you a decent level of information., but RJ seems to be recommended most commonly. You don't need to actually be flying on RJ, as long as it's an Amadeus booking reference (i.e. Qantas), your whole itinerary will show including e-ticket numbers (or lack thereof), and it shows all passengers unlike CMT which will only show passenger information that matches the account info. However, you can't use this to get alerts of itinerary changes the way CMT does, so I personally use both methods.