Originally Posted by beckoa

We do know its being launched on a 737-700, so my guess it'll be tested on all types of routes, except Hawaii, since those are operated on a 737-800. It will be nice to know!

Now for some speculation:

According to AS they operate 20 737-700 aircraft. Using another resource, planespotters, one can see the plane numbers of the aircraft. So, it's whittled down to 20 specific aircraft now, what else can we use to further determine which one will be no. 1?