Hello!
Thank you for this valuable feedback (I'm working in the Akeneo Core Team).
You can find some cookbooks on how to create a connector here http://docs.akeneo.com/latest/cookbook/import_export/index.html
We know that the tech doc is a bit poor but we're continuously trying to improve it, BTW contribution is welcomed
Don't hesitate to open a new topic on Akeneo's forum if you've any questions on the connector implementation http://www.akeneo.com/forums/forum/importexport-connectors/
Opening a github repository is also a good idea, we'll be glad to help you on the development of this new connector!
BR