It actually brings up a point that I had been thinking about, which is how your spiderwalk effect actually works. The way you describe it, is that it is not like Spiderman(TM)'s ability, where you adhere to a surface in some way. It seems to actually change gravity, at least insofar as it concerns your body. It changes what you perceive as "down". Of course, we are dealing with a fictional universe, and as a GM, if I decide that gravity as a force does not exit, and that it is actually ... oh, let's say love that attracts masses to each other, I can do that.
It's also cool to think about how this feeds into the power behind a warlock. If a warlock's power comes from the Dragon Below, maybe he/she/it is trying to subvert the natural order of Eberron and further the cause of chaos and destruction. If the power is drawn from the planes of Xoriat, which could also be postulated, a similar scenario could also work.
These are the kinds of things my mind wanders off on when I am at work. It's a wonder I ever get anything done around here.