So I mailed the crew at the Just Leap In website if they were going to make it available for Linux and here's the nice reply I got:

Hi there,

Thanks for asking. Our development team has discussed a Linux version of the JLI player (we're avid Ubuntu users in-house!), but it's still on the drawing board -- and likely a long time to beta delivery, as we've still got a ways to go on the Mac and Windows versions. Sorry!

We'll definitely keep you posted (via the blog, and by email if you register) as new versions become available and we figure out where Linux compatibility fits on the roadmap.

Best wishes,

--
The JLI Team


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