HI Gary Teeling - I have responded to this in a PM as well, but I will post here also for posterity,
I would strongly suggest starting on UNA, as starting on Dolphin and moving to UNA later will be troublesome. As a quick start we could launch you on our UNA 'Dolphin Solution' which is a turnkey generic social media solution built on UNA, that should fit your bill. Similar to our Online.me design, this option is not launched publicly yet, but we can install it as a starting point for UNA Cloud clients.