(Whoops -- that subject line was supposed to be "Trial Preferred" -- anyone know how to fix it?) Most of you likely know this already, but I just spoke with an informed Dividend Miles agent (not always easy to come by) and learned the following: 1. If you do the trial preferred program, at the end of the 90 days you will receive the highest status you earned. In other words, if you sign up for a Silver trial but then fly 30K miles in 90 days, you will receive CP status for the remainder of the year. 2. The difference in challenge price is because, for the 90 days of the trial, you will have the status you pay for. So, for 90 days, I will be US Airways Silver. If I want a higher status during that time, I will have to pay the higher challenge price. After the challenge, however, I will have whatever status I earned. 3. The agent said I should wait until the day before, or even the day of, my flight to sign up for the trial preferred program. First, because it maximizes the 90 day window. Secondly, because you will still be eligible for upgrades on your flight that day -- you'll just need to ask the gate agent to re-enter your DM# and it will reflect your new status. Again, my apologies if this feature of the program was well known, but it was new information to me, and I wanted to pass it along.