Looking good! I like you edge splints. That approach could help with compound curvature. I haven't worked with Coroplast yet myself. But future projects beg for it. I wondered about gluing previously but never pursued the topic. You super glue mention got me curious enough to start looking. I found these links helpful.
Coroplast - Manufacturer of Corrugated Plastic Sheets
Coroplast - Wikipedia, the free encyclopedia
The Recumbent Bicycle and Human Powered Vehicle Information Center
How to Glue Coroplast | eHow.com
Rock on!