Hi kramerzoo,
We'll be testing the magic bands on our next vacation at the end of the month. I already have the bands. They are resort dependent not tickets.
I have a FL Seasonal Pass linked to my MDE account and those going with me will be using Disney Armed Forces Salute tickets, which 1. are not available on base yet, 2. even if they were they are not the tickets (ticket numbers) they'll use in the parks due to the ticket exchange at activation.
So like you I have to wait till on property to link them in MDE.
I was able to browse FP+ for our vacation for me, they were greyed out as they have no tickets linked about 3 weeks ago as soon as our resort came out on the test list. I tried for our first day at Epcot and requested Soarin, Test Track, and Mission Space. At that point 7 weeks out the return times were all late in the day (earlier ones gone!) 3:40, 4:45, & 6:20. By the time I get there there wont be any left.
I've made Disney aware of this as has my travel agent friend. They have no solution yet.
Remember they are still in beta testing, they are just trying to get the basics going, let alone worry about us...
Steve