Originally Posted by
mnmag
I have 'searched' & can't find the exact procedures listed for the UDU process, other than the general description! I am totally new to the UA system, so would appreciate some explanation about what to expect!
Right now, a couple of my reservations (booked on CO) w/UA legs show 'upgrade: pending' -- so I am assuming that if the UDU comes through -- it will say 'confirmed' with a new seat assignment -- is this correct?!

you are correct
Until you reach the time window for your status, you will have the Pending message.
Once you reach the time window, you will become Confirmed or Waitlisted.
There is a mega-thread on UDU,
http://www.flyertalk.com/forum/unite...-ownwards.html that may be useful to follow to learn more on UDU.