I just ordered and watched them configure my 2015 RAM 2500 Crew Cab 4x4 Cummins in the system. The options looked nearly identical to those available to the 2014, but I'd still like to know if there are any differences I just wouldn't notice in the system. I was told it is roughly 8 weeks out which would put it well past your August date, early-mid October. This is supposed to be the earliest it could be done, at least according to my local dealer. I was told I got one of their 'priority' build slots, but I have no idea if that was BS to make me feel good or they legitimately get some kind of priority slotting system and I'll be one of the first to get one.
I still haven't even really seen a 2015 2500/3500 official release with specs and such. Anyone else with similar experience or knowledge?