On these pages you will find a lot more of interesting things for diagnostics. An excellent point to start are the Success Stories and the screencasts section.
To obtain a first impression of d3web, you may also consult the knowledge base examples. There you will get a good overview of the capabilities of the d3web platform. Enjoy!
Image credits: Dave & Margie Hill / Kleerup licensed CC-BY-SA 2.0; Daniel Stockman licensed CC-BY-SA 2.0