Nevermind! Turns out that I either misread this article or it's out of
date:
http://pragprog.com/magazines/2010-07/bdd-on-iphone-icuke
The gist above is what you experience when you manually run the app in
in the simulator and *then* try running cucumber. Re-running cucumber
once I shut down the simulator fixed the issue and correctly launched
the simulator under waxsim.
-Justin