in my case, it's showing on my itineraries as confirmed, but i'm unable to upgrade online.

just got the following email from orbitz. emphasis mine.

Hello karenkay,

Thanks for booking your flight on Orbitz. This purchase is subject to our
Privacy Policy and our Terms and Conditions.
( http://www.orbitz.com/pagedef/conten.../privacy05.jsp )
( http://www.orbitz.com/pagedef/content/legal/terms05.jsp )
THIS RESERVATION REQUEST HAS BEEN SENT TO THE AIRLINE(S). FINAL PURCHASE IS
PENDING UNTIL WE RECEIVE CONFIRMATION FROM THE AIRLINE(S). ONCE THAT
CONFIRMATION IS RECEIVED, WE WILL ISSUE THE TICKET(S), AND SEND A "TRAVEL
DOCUMENT" E-MAIL INCLUDING TRIP DETAILS AND TICKET NUMBER(S) WITHIN 24 HOURS.

PLEASE NOTE: YOU CANNOT USE THIS DOCUMENT TO PASS THROUGH AIRPORT SECURITY
BECAUSE IT DOES NOT CONTAIN YOUR TICKET NUMBER(S).

Please review your flight information as it appears below. Your Orbitz record
locator is XXXXXXXXXXXXXXXX.

TICKET INFORMATION
**********************

Passenger(s): KARENKAYMRKAY

Orbitz record locator: XXXXXXXXXXXXX

United Airlines record locator: XXXXXXX
Thai Airways record locator: XXXXXX

Airline ticket number(s): Pending confirmation from the airline(s)
Ticket type requested: electronic (e-ticket)

Base Fare: $2,625.15 USD
Taxes: $328.33 USD
Service fee: $21.98
Total trip cost: $2,953.48 USD