Not sure if this is new, but customers have been commenting that with the new view/change function under My Itineraries on united.com, waitlisted flights no longer display. However, I just discovered that if you choose "change itinerary" you will see if you have a waitlisted (for upgrade) flight, at the bottom of the page. It will also allow you to remove yourself from the waitlist.

Is this new?

------------------
Thank you for flying and staying UNITED. Your business and support is highly appreciated. Enjoy your flight and spread the word!