It might make sense to clear up some issues that have been discussed. Bluetooth loco control and battery power are two entirely different and independent modes of operation, so let's separate the two. The BlueRail Trains board provides flawless control of a loco at distances up to 100 feet. The board uses carefully controlled PWM to which can motors respond very nicely. It can also control four auxilliary functions. When operating, there is two-way communications between the loco and the iPad/iPhone. It can be powered from the track. It was originally designed for HO and has some current limitations, but a higher power version is in the works. It's main feature is that it uses a control system that younger people are growing up with and also steps around that track signal propogation issue.
Battery power for OGauge is a completely different subject. The newer batteries make this mode more realizable than ever before, so why not look into it? I chose to do both because the BlueRail board is the newer low-energy version which means that almost all of the battery power is available to run the motors and lights. One of the areas that needs work is to simplify the recharging and we are looking into a number of approaches.
Hope this clarifies some points.
