This is my current field of interest and I am reading many of papers (some good and some bad) on the subject. I searched the net and found that there are some lists with papers on the subject but most of them are outdated, so I decided to create my own list. You are invited to send me papers that you also think relevant by adding comments to the page.
01/01/2012 Update – The link is now invalid. See this post for a longer explanation.
As part of the closing of Google Labs, the Android App Inventor visual programming engine for the Android platform will be shut down and the code transferred to MIT labs for maintenance and future use (see this and this articles).
From what the articles said, the programming environment was primary used in learning environments, and from my point of view, since they are closing it and giving the code for free, it was probably not much of a success. Another try at visual programming gone away.