Hey guys,
Yes, this release is only going to be allowed for pre-registered official company reps., like from Sprint and such. You trying to get the download will not get you anywhere, just wait until it is released to End-Users. When it is available to end-users, you will be able to download a trial, and use it for 14 days, as with all other Spb products.
Also, there will be a montly fee, but only for premium services. You can purchase from the Shop, and mostly everything else, without having to pay monthly.
This of course, is to be determined, so it may change. All I am saying is, some things you get with purchase, and other things you get to keep after purchase. Considering Sprint has pretty low prices, you can probably expect Spb to try and be aiming to either provide more than competition, or the same at a reasonably lower price. This isn't official, just guesses from experience.