NADA Mobile is a suite of applications, originated at Tellart in 2008, for running xhtml css javascript "sketches" of new applications. The sketches run on the iPhone/iPod Touch hardware but are even useful for prototyping things that aren't going to be iPhone apps. "Sketches" are generally built in Apple Dashcode, or just a text editor, and then uploaded to the RunSketch iPhone app using a desktop app called SketchServer.
NADA Mobile is an enhanced version of Mobile Safari that gives you access to the accelerometer, GPS, microphone--and can even be used to read the value of an external analog sensor attached to the device's mic input (without using a computer or a microcontroller).
Using NADA Mobile
To use NADA Mobile you need to install the part that runs on the desktop and the part that runs on the iPhone/iPod Touch. The desktop part is easy--just download the latest copy from the Downloads section of this site.
Instructions for the part that runs on the iPhone/iPod Touch are included in the download. If you have a "jailbroken" device you can install the part that runs on your iPhone/iPod Touch through Cydia. If you are a member of Apple's iPhone Developer Program you can build your own signed copy to run on your developer device.