@ArcadEd: The sound should generally work, it's just that licensing legality doesn't allow us to distribute codecs with the simulator. WAV and some MP3 audio will occasionally work, but it's a bit of a shot in the dark at times.
And that tool would be great. Once the WebGL rendering issue is squashed, I plan to put up a porting guide for Construct 2 devs (sort of a formal writeup of the posts in this thread.) If you get a GUI solution going, I'd be happy to link to it as well. The ultimate goal is a C2 plugin but a few steps at a time :-)
I'll also put this offer out to the community. On Feb. 5th/6th I'm going to be in Amsterdam for BlackBerry 10 Jam Europe. I'm presenting a session on various frameworks and will be highlighting Construct 2 in that talk as well. If any developers here want their converted BB10 app showcased on stage with a little blurb about the author, fire me an email to email@example.com. I'll likely only be able to show off 2 or 3, but thought it might be some cool exposure.