Hi Martyn,
great question, I've been eagerly awaiting this feature too! It would seem that what we are currently experiencing is the developers have exposed the "Dynamic" field types, but the mechanism to populate the list of data Providers is yet to be delivered.
From Hornbill Administration version 1.0.0.262, the Data Provider will be populated with a list of your Simple lists that you have configured in the context of Hornbill Service Manager > Data > Simple Lists.
Hornbill Administration build .262 should be available to customer sometime during Week 1 2016. I'll ensure the wiki is updated accordingly to accompany this release.
Hope that helps,
Dan