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I've been looking at htmlarea3 and it does look pretty good. It doesn't support "all" browsers, but at least it is cross-platfarm so that everyone would at least have the ability to run it, even if not on their favorite browser. As a Linux user, I know that this would be great for me.

If nobody else takes this on, maybe I can try to hack it into one of the modules that currently uses spaw to see how it works.
John