Disrupting CloudHSM – any takers?

Having worked with HSMs for 10 years, we decided they are not fit for purpose (Unwrapping the Chrysalis, Fighting the 'Good' Internet War, Architecture Considerations for Massively Parallel Hardware Security Platform).

We built a web-service with JSON/RESTful interface, truly scalable, still with secure hardware ticking inside.

We want to create a few applications for Amazon Marketplace over the Summer.

What would be your use-case?