The CloudOn app is no longer available in the US App store. When the product was described yesterday, there was no indication that there was a limited number of “spots” available. It may be that this is an alpha product that is being used by the developers to hone the product.
The web page now states:
Thanks for your support of CloudOn! We’re currently sold out. We look forward to the feedback we will receive as we continue to support the many users that have registered in this first phase. If you missed out on our first release, please sign up here.