Hi,
not a question, but really showing the current results of a project I am doing for someone (that includes all the electronic as well) where I am usingTitanium to create the associated mobile app.
The app basically turns the phone into a remote speed control with the help of a small box of tricks, an RPi and some custom electronics.
Still only in prototype, but damn good fun getting it all to work.
My (not very good) Youtube video of it working here.
http://youtu.be/DGxk8om6UgI