I noticed that some folks on this thread are aware of my book, IBM
Rational Business Developer with EGL. The work is not solely an overview
for managers, nor is it specific to the product identified in the title.
The book is an overview of EGL itself and clarifies much. When I read
that folks find the language difficult, I think, "Well... the book isn't
difficult, and it tells the story." And the background will help you
understand the Rich UI components that are now on IBM alphaworks.
EGL Book: http://www.mc-store.com/5087.html
Access to Rich UI: