The demo you are referring to is for the BIG-IP user interface, but this machine is not provisioned for a demo usage of iControl. To this point we have had no requests from customers/partners who are developing iControl applications but do not have access to one of our devices. I will pass your request along to product management. If your organization does not currently have a BIG-IP, they can apply for an evaluation unit through our sales channel whose information is available on our website.
Feel free to contact us here for any programming related questions. We look forward to hearing what users are doing (or planning on doing) and receiving any and all feedback. Any information we can get will help us make a better product.
-Joe