I wouldn't nag them. It's not the most useful of apps, nowadays. We concentrated on browser applets, at the time, rather than command-line usage. Nowadays, Java is really the other way round.
And the language support is a bit lacking (1.0 doesn't support child classes, IIRC), and the libraries are rather dated, so I'm not sure how much use it would be for people wanting to learn Java.
But given Sun's Java is now GNU licensed, if Castle were willing to GNU license the Acorn Java code, it would be a sensible starting point for a new port. But I agree with others - the effort should be more usefully put elsewhere.
Hmm, Castle probably own the rights to the Acorn Java port (it was transferred to Pace, so I assume Castle got them).
Sun granted me a free non-commercial licence to their parts, when Acorn was dissolved, but I didn't have the time to finish the 1.2 port - to release it, you'd need to pass the JCK, which is a huge test suite.
It was decided not to release 1.0.2 free due to dealers still having Riscafe CDs in stock.
It'd be a huge job to get it up and running, but basing a port on the 1.2 AWT would make a lot of sense, if someone were mad enough to bother.
I'm not quite sure why it keeps getting compared to Flash - yes, in a browser environment, Java's irrelevant these days, but outside browsers, Java's more useful than Flash, IMO.