Yeah, you mine it with a small JavaScript code that is loaded and which is actually searching hashes. Their code is open sourced on Github, you can have a look if you want.

As for a potential Steem / JSECoin combination, I actually thought about something else: why not giving Steemians the option to use JSECoin as an alternative to AdSense ads?

If @ned is not keen on that, I might throw one of my steem-related domains to this one, wrap up some patches on top of condenser and see if it catches on.