Google have handed over the cook book to their App Inventor to MIT, and have promptly dumped out a public beta. This means that you, your mom, friends, whoever really, can log into the MIT App Inventor, as long as you have a valid Google ID.
Most people have already heard of this, when it was known as the Google App Inventor, but this is still new, news, really. Hop to it, and start inventing some apps that I can use as our Mobile App of the Day.
Google first launched App Inventor in mid-2010, which was then rinsed, discontinued and then open-sourced only last year. This now allows anyone to jump right into Android application development, with a simple web-based interface.