Depending on how this would be implemented and what it would integrate with, I'd be interested in this. We use Openbravo POS, an open-source POS.

We have a fair number of workstations setup and it's a bit of a pain to ensure each of them that might need to access the cameras at some point have the remote client installed. If an employee happens to be at a workstation that doesn't have the remote client installed and has a reason to need to check a recent, but past, event in a hurry, they're out of luck right now.

A surprising number of retail stores (even some franchises) are using OS X for their cash registers these days. An OS X client would allow them to have a full-featured client that can run on their register.

I'd be willing to beta test or help out with this.