So once I got started with App Inventor installed and running I found I needed to see some examples of how to build an app. There are not a tremendous amount of sources for tutorials- but there are some very good ones available. First off:
App Inventor Resources- This is a tremendous source of information. There are several tutorials and various links to other developers. It helped me tremendously.
App Inventor Forum- This is the official forum for App Inventor. Chances are, your questions have been already answered in the posts.
theAIRepository.info- More handy tutorials from various sources.
YouTube- Some good tutorials from various sources. Here are a few:
Check out the different videos for each of the channels above. There are some fantastic tutorials and motivational information.
Cheers